Fighters loyal to Libya's U.N.-backed government (GNA) fire guns during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, Libya May 25, 2019. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) takes a photo of a rocket fired by troops loyal to Khalifa Haftar in Tripoli, Libya May 27. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) shouts after escaping incoming rounds during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, Libya May 25. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) looks at a room burned during clashes with troops loyal to Khalifa Haftar in Wadi Rabiya neighborhood at outskirts of Tripoli, May 28. REUTERS/Goran Tomasevic 

A damaged tank belonging to fighters loyal to Libya's U.N.-backed government (GNA) is seen in Wadi Rabiya neighborhood at outskirts of Tripoli, Libya May 28. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) fires a mortar during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 25. REUTERS/Goran Tomasevic 

Men walk in front of Rixos hotel damaged by a rocket in Tripoli, Libya May 24. REUTERS/Goran Tomasevic 

Fighters loyal to Libya's U.N.-backed government (GNA) gesture during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, Libya May 25. REUTERS/Goran Tomasevic 

A damaged wall of a mosque is seen after forces loyal to Khalifa Haftar fired a mortar shell in Wadi Rabiya neighbourhood at outskirts of Tripoli, May 28. REUTERS/Goran Tomasevic 

A wounded fighter loyal to Libya's U.N.-backed government (GNA) walks in front of a house burned during clashes with troops loyal to Khalifa Haftar in Wadi Rabiya neighborhood at outskirts of Tripoli, Libya May 28. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) fires a 105 mm recoilless rifle during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, Libya May 25. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) gestures during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 25. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) oils bullets during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 25. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) prays during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 25. REUTERS/Goran Tomasevic 

Fighters loyal to Libya's U.N.-backed government (GNA) hold RPG-s (rocket-propelled grenades) during clashes with forces loyal to Khalifa Haftar at the outskirts of Tripoli, Libya May 25. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) fires a weapon during a clash with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) shouts during a clash with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) fires a RPG during a clash with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

Fighters loyal to Libya's U.N.-backed government (GNA) fire weapons during a clash with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) shouts during clashes with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) drives in a damage pickup truck during a clash with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) fires a weapon during a clash with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

A fighter loyal to Libyan internationally recognized government fires a heavy machine gun during clashes with forces loyal to Khalifa Haftar on outskirts of Tripoli, May 16. REUTERS/Goran Tomasevic 

Fighters loyal to Libya's U.N.-backed government (GNA) take cover during a clash with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

A fighter loyal to Libya's U.N.-backed government (GNA) gestures during a clash with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

A fighter loyal to Libyan internationally recognized government fires a 105 mm cannon at forces loyal to Khalifa Haftar outside Tripoli, May 15. REUTERS/Goran Tomasevic 

Fighters loyal to Libya's U.N.-backed government (GNA) walk during a clash with forces loyal to Khalifa Haftar on the outskirts of Tripoli, May 21. REUTERS/Goran Tomasevic 

A member of the Libyan internationally recognized government forces operates a drone on outskirts of Tripoli, May 11. REUTERS/Goran Tomasevic 

A fighter loyal to Libyan internationally recognized government walk inside a building on outskirts of Tripoli, Libya, May 16. REUTERS/Goran Tomasevic 

Fighters loyal to Libyan internationally recognized government fire guns at forces loyal to Khalifa Haftar outside Tripoli, May 15. REUTERS/Goran Tomasevic 

A member of the Libyan internationally recognized government forces jumps from a wall after he fired a rifle on the outskirts of Tripoli, May 12. REUTERS/Goran Tomasevic 

A member of the Libyan internationally recognized government fires a rifle as other fighter takes a rest at outskirts of Tripoli, May 12. REUTERS/Goran Tomasevic