At least 65 people were killed and dozens injured on Thursday when a truck bomb exploded at a police training centre in Zliten town of Libya, local officials and hospital sources said.
The attack came in wake of a UN deal, signed in December, between rival sanctions of Libya. No group has immediately claimed responsibility for the attack.
Miftah Lahmadi, the mayor of Zliten, a town located between the capital Tripoli and the port of Misrata, said the truck exploded as hundreds of recruits gathered for a graduation ceremony.
Witnesses said the casualties included civilians, some of whom were taken to hospital in the nearby city of Misrata. Many of victims had shapnel wounds.
Stating that four of the 50 wounded people have been brought to the hospital died after their arrival, Misurata Central Hospital has urged all citizens for blood donations to save the lives of heavily injured victims.
The attack in Libya was the deadliest in years since the fall of autocrat Muammar Gaddafi in 2011, who was killed amid a NATO-backed military campaign to remove him from power. After his fall the country was dragged to a civil war.
Libya is currently split between two rival parliaments, the General National Assembly (GNC) based in Tripoli and the House of Representatives (HoR) based in the eastern city of Tobruk.
The two governments, recently signed a UN-brokered deal to establish unity government, despite resistance in both parliaments. A unity government could help in the battle against DAESH terrorists and make the country more stable.
Lack of unity in the country paved the way for DAESH to take advantage of security vacuum and expand its presence to Libya, where they have taken over the city of Sirte and launched attacks on oilfields.