Ten Libyan presidential guards were killed when an IS suicide bomb attack hit a police station located in the outskirts of Sirte, media office of the presidential guards announced.
The attack took place at dawn in the nearby town of Abo-Gren, the office said. The government forces also announced that the IS launched two car bomb attacks but the two bombs exploded before hitting the troops.
The government forces have been engaged in a violent war in the city of Sirte, some 450 km east the capital Tripoli, since May, which have killed and injured hundreds of the government forces.
The presidential guards are formed by the UN-backed unity government to fight against the IS.
The media office of the presidential guards said that they have controlled most of the city. The terrorist group has launched seven suicide bomb attacks on the government forces since Sunday.
Sirte, the hometown of the late leader Muammar Gaddafi, was dominated by the IS for over a year.