Two strong earthquakes measuring 6.8 on the Richter scale were felt on the island of Zakynthos in Greece within half an hour. A tsunami warning was launched in the area, and at least three people were stabbed to death for medical treatment in a hospital.

Two powerful earthquakes – magnitude 6.8 on the Richter scale – occurred overnight (between Thursday and Friday) half an hour west of the Greek coast, causing tremors hundreds of kilometers away and fears of a tsunami. At least three people needed medical treatment in the hospital following the tremor that was felt in the popular island of Zakynthos among tourists.

officials in Greece have confirmed that the possibility of a tsunami warning was triggered and indeed sea level rose by 20 quake zone inches. The US Geological Survey reported that the first epicenter was about 10 kilometers below surface – so the effects and tremors were felt more on the ground because of the relative proximity to the upper layer of the Earth.

“We are in constant contact with the local authorities to identify and locate places that were damaged as a result of the earthquake,” a spokesman for the Greek Civil Defense Agency said.