A militant group on Thursday claimed responsibility the attack, according to a statement on a website close to the Revolutionary People's Liberation Party/Front, the DHKP-C.
"Greetings to you, our two brave female liberation fighters who have taken the people's liberation fight on their shoulders," the statement said.
The group has repeatedly staged similar attacks on police stations, largely in Istanbul's suburbs.
Two women opened fire and threw a grenade at a Turkish police bus as it arrived at a station in an Istanbul suburb Thursday, footage from the Dogan news agency shows. Television stations said there were no casualties.
One of the women threw a grenade and the other opened fire with what appeared to be a machine gun as the riot police bus drove towards the station entrance in the Bayrampasa district of Turkey's biggest city, the footage shows.
Police returned fire, injuring one of the women, before tracking them to a nearby building, CNN Turk said. Special forces were sent to the area and residents were evacuated as security forces prepared to carry out an operation, it said.
The news comes less than a month after a suicide car bombing targeted military buses in Ankara and killed 29 people, which was carried out by a Kurdish militant group known as the Kurdistan Freedom Falcons.
The recent attack come as the government has been carrying out a major operation in the country’s majority Kurdish southeast region against the Kurdistan Workers’ Party (PKK) since last summer that has killed hundreds of civilians, Kurdish fighters and Turkish troops.