greece
A strong earthquake struck off the Greek tourist island of Zakynthos early Friday morning. In the image, a group of mechanics look at damages at the main port of the Kos island, Greece, July 22, 2017. LOUISA GOULIAMAKI/AFP/Getty Images

UPDATE: 11.30 p.m. EDT - According to local media, all schools and services will remain closed in Zakynthos on Friday following the quake. A 15th-century monastery in the Strofades area had suffered immeasurable damage and the port of Zakynthos had slight damages. Sea level changes were observed at the monitoring station of Katakolo.

Original story:

A strong earthquake struck off the Greek tourist island of Zakynthos early Friday morning. The tremors were felt in Greece's capital Athens and also in Italy, Malta, Albania and Libya; however, there were no initial reports of extensive damages or casualties.

The U.S. Geological Survey (USGS) reported the magnitude 6.8 quake was 35.9 kilometers (22.3 miles) southwest of Lithakia in the southern part of Zakynthos and had a depth of 16 kilometers. Power was briefly down in the island.

"We're checking out the villages on the island, where there are several older buildings. The lack of electricity is a problem, but technicians are trying to restore power," civil protection agency press spokesman Spyros Georgiou told the Associated Press.

He added that though a precautionary tsunami warning was issued, nothing materialized.

The fire service said rockfalls were reported in some parts of the island and a part of a church wall also collapsed. Some people sustained minor injuries.

Videos showing the aftermath of the quake were circulated on social media.