Two gunmen stormed the offices of Turkey's ruling AK Party in Kartal district, an Istanbul suburb, reports Reuters.
A local news source reports police have surrounded and sealed off the premises.
The incident follows the a hostage situation which took place on Tuesday in an Istanbul courthouse. A public prosecutor, identified as Mehmet Selim Kiraz, was taken hostage by three men at around 12:30 pm Turkish time on the on the sixth floor of the Okmeydani district courthouse.
He has since passed away from a fatal gunshot wound.
Kiraz was handling the case of Berkin Elvan, who was critically injured during the 2013 Gezi Park protests and died in March 2014 after being in a coma for 269 days.
It is suspected the hostage-takers were linked to the outlawed Marxist Revolutionary People's Liberation Party-Front (DHKP-C)
Twenty-two students linked to DHKP-C were arrested in Antalya on earlier today.
More details to come...
