Libyan forces allied to militia leader Khalifa Haftar launched air strikes early Tuesday against a government airbase in third city Misrata, hours after a bombing in the south of the country left 42 people dead.
"Our air force carried out several raids against the Misrata airbase, targeting anti-air defences as well as a Turkish aircraft transporting ammunition, drones and missiles," Haftar's self-styled Libyan National Army said in a statement on its Facebook page.
Pro-Haftar television channel Libya Al-Hadath said a Turkish Ilyushin aircraft "was destroyed as it landed at the Misrata base", airing footage of the alleged strikes.
Forces loyal to the UN-recognised Government of National Accord (GNA) did not comment on the reports. Haftar forces launched an offensive in April to capture the Libyan capital.
Many of the government's best equipped and most seasoned fighters come from Misrata, which is east of the Libyan capital.
Turkey and Qatar have been the main supporters of the GNA government, while Egypt, Saudi Arabia and the United Arab Emirates have backed Haftar.