The Turkish far-left group DHKP-C has claimed responsibility for a grenade attack on police near the Turkish prime minister's office in Istanbul.
DHKP-C (Revolutionary People's Liberation Party-Front) was also behind a suicide bombing at the US Embassy last year as well as attacks on Turkish police stations.
A man carrying an automatic weapon was detained on Thursday near the historic Dolmabahce Palace in Turkey's largest city after he threw a grenade at police.
In a statement posted on "The People's Cry" website, the group said the attack over against the ruling AK Party over the killing of 15-year-old Berkin Elvan, who died in March last year after nine months in a coma from a head wound sustained during an anti-government protest.
The DHKP-C also called Turkish President Tayyip Erdogan the perpetrator of Elvan's death said it would hold his AK Party to account.