A new earthquake has struck the Emilia region in northern Italy, killing at least eight people and burying several others under rubble, local media say.
All the deaths were in the Modena area - three were killed when an industrial shed collapsed in Medolla, three died in San Felice and two in Mirandola.
Tuesday's tremor, estimated at 5.8 magnitude, hit the same region where a quake 10 days ago killed seven people and destroyed many buildings.
Milan and Bologna were shaken too.
Some people fled from buildings when they felt the tremor, which struck at 09:03 local time (07:03 GMT).
Italian media report that some buildings damaged by the larger 20 May quake have now collapsed in Mirandola, Finale Emilia, San Felice and Cavezzo. That quake measured 6.0.
Calls to emergency services have overloaded the telephone network in some areas, causing a system blackout. Train services have been halted in some parts of northern Italy.
Office workers were evacuated in Bologna and there are reports of evacuations elsewhere too.
The quake struck 40km north of Bologna and 60km east of Parma, at a depth of 9.6km (six miles), Reuters reports.
The 20 May quake destroyed many centuries-old buildings of cultural value. It was the worst to hit Italy since the L'Aquila tremor that killed nearly 300 people in 2009.
About 7,000 people who fled that quake are still living in dozens of tented camps erected in public spaces, AFP news agency reports. There have been many tremors in the region since that quake.