Libyan officials say a truck bomb exploded in the western town of Zliten near a police camp, killing at least 60 policemen and wounding at least 200.

No one claimed responsibility for the bombing Thursday, but a local Islamic State affiliate has been trying to spread to Zliten from its central stronghold of Sirte.

Zliten Hospital spokesman Moamar Kaddi says rescue crews have they only managed to extract 60 bodies out of the wreckage, and Libyan officials said they believed there might be dozens more dead.

Speaking anonymously in line with regulations, a security official said the camp was used by border police.