At least 28 people were killed in an attack on a military academy in the Libyan capital late on Saturday, the health minister of the Tripoli-based government said.
Tripoli, which is under the control of the internationally recognized Government of National Accord (GNA), is facing an offensive by military commander Khalifa Haftar's Libyan National Army (LNA) that began in April.
There has been an increase in airstrikes and shelling around Tripoli in recent weeks, with fears that fighting could escalate further after Turkey's parliament voted to allow a troop deployment in support of the GNA.