ISTANBUL, Turkey —  A magnitude-5.9 earthquake shook the Aegean port city of Izmir Friday, sending panicked residents into the streets.

About 15 people were brought to hospitals with minor injuries or heart attacks brought on by the quake, according to one TV report.

Oguz Kagan KÊoksal (search), governor of Izmir province (search), said there were no immediate reports of deaths. "Everyone is in the streets," Koksal said, according to the Anatolia news agency. He said five buildings were damaged in Izmir, Turkey's third largest city.

The quake was centered in Seferihisar, Turkey, the Istanbul-based Kandilli Observatory (search) said, but was felt in Istanbul and the Greek islands of Chios and Mytilini near the Turkish coast. Seferihisar is 190 miles south of Istanbul.

Three quakes of similar magnitudes shook Izmir earlier this week.