(CNN)A powerful 6.6-magnitude earthquake rocked central Italy on Sunday morning, injuring at least 20 people, in the strongest tremor to hit the country in more than three decades.
The earthquake follows tremors last week and comes on the heels of a devastating quake in August, which killed nearly 300 people and flattened entire villages.
Rescuers have expressed fear about possible mudslides and remained wary about the risk of bringing heavy equipment up narrow roads linking the towns, villages and hamlets in this hilly region of the country.
The two earthquakes on Wednesday — which had magnitudes of 5.5 and 6.1 — did not result in any reported deaths. But the destruction of nearby historic structures was widely seen as a loss to cultural heritage.
Powerful tremors on Wednesday and Thursday happened about 50 miles north of where a devastating quake killed nearly 300 people in August.