Istanbul police arrested Saturday five suspects over the rocket attacks that targeted the provincial police headquarters and the ruling Justice and Development (AK) Party headquarters in Istanbul on Friday evening, a police source said.
Security forces raided 15 addresses across Turkey's largest city, and five people were taken into custody over suspected links to the attackers, the source said on condition of anonymity due to restrictions on talking to the media.
Istanbul Governor Vasip Sahin said on Twitter late Friday that no one was injured in the attack on the police headquarters, and an investigation had been launched.
No injuries were reported after the attack on the AK Party headquarters, according to a Twitter post by the group's provincial head, Selim Temurci on Friday.
He told reporters later on Friday that the rocket pierced the wall of the building but did not explode, and pointed to the involvement of the ultra-left Revolutionary People's Liberation Party-Front (DHKP-C).
He also said two assailants were involved in the attack.
