Darinko Dumbovic

Croatia's Seismological Service on Wednesday at 6.15am, 6.26am and 6.29am recorded three more earthquakes centred not far from the town of Petrinja, some 60 km south of Zagreb - the town which was seriously damaged by powerful quakes on Tuesday that killed at least seven people.

An earthquake with a magnitude of 6.3 on the Richter scale hit the Petrinja area, south of the capital Zagreb, at 12.20 on Tuesday, the European Mediterranean Seismological Centre said.

After a severe earthquake struck the Croatian capital Zagreb in March this year, another series of slightly smaller quakes hit the country south of the capital on Monday.

The strongest one with a magnitude of 5 on the Richter scale had its epicenter some 12 kilometres southwest of Sisak, 60 km south of Zagreb.