A bomb has exploded outside the Athens offices of a fan club for the premier league Panathinaikos football club, damaging the building and several nearby parked cars but causing no injuries.

Panathinaikos have unveiled former Chelsea assistant coach Henk ten Cate as their new coach.

Panathinaikos FC leapt back into contention in Group C with a 2-0 win against AC Sparta Prague at the Letná stadium.