By Alptekin Soykan

ISTANBUL

Unidentified assailants set four minibuses and one truck ablaze in Istanbul's Eyup district early Wednesday, police said.

Police officials, who spoke on condition of anonymity as they are not authorized to speak to the media, said the assailants set fire to the vehicles with flammable material, which also damaged a four-story building.

Police launched an investigation to find the assailants.

On May 5, five cars were also set ablaze in Eyup district.

*Anadolu Agency correspondent Servet Gunerigok contributed to this story from Ankara.