Rabat, Morocco. A rare, powerful earthquake struck Morocco late Friday night, killing hundreds of people and damaging buildings from villages in the Atlas Mountains to the historic city of Marrakech.

Morocco’s Interior Ministry said early Saturday that at least 296 people had died in the provinces near the quake. Additionally, 153 injured people were sent to hospitals for treatment. The ministry wrote that most damage occurred outside of cities and towns.

Moroccan television showed scenes from the aftermath, as many stayed outside fearing aftershocks.

Anxious families stood in the streets or huddled on the pavement, some carrying children, blankets, or other belongings. Emergency workers climbed over heaps of stones, the remains of crumbled walls. A car was nearly buried by the chunks of a collapsed building.

Baskets, buckets and clothing could be seen amid scattered stones in the remains of one building.

In the immediate aftermath of the quake, images shared online showed people running and screaming near the 12th-century Koutoubia Mosque in Marrakech, one of the city’s most famed landmarks. Moroccan media reported that the mosque suffered damage, but the extent was not immediately clear. Its 69-meter (226-foot) minaret is known as the “roof of Marrakech.”

Moroccans also posted videos showing parts of the famous red walls that surround the old city of Marrakech, a UNESCO World Heritage site, damaged.

The head of a town near the earthquake's epicenter told Moroccan news site 2M that several homes in nearby towns had partly or totally collapsed, and electricity and roads were cut off in some places.

Abderrahim Ait Daoud, head of the town of Talat N’Yaaqoub, said authorities are working to clear roads in Al Haouz Province to allow passage for ambulances and aid to populations affected, but said large distances between mountain villages mean it will take time to learn the extent of the damage.

Local media reported that roads leading to the mountain region around the epicenter were jammed with vehicles and blocked with collapsed rocks, slowing rescue efforts.

The U.S. Geological Survey said the quake had a preliminary magnitude of 6.8 when it hit at 11:11 p.m. (2211 GMT), with shaking that lasted several seconds. The U.S. agency reported a magnitude-4.9 aftershock hit 19 minutes later.

The epicenter of Friday’s tremor was near the town of Ighil in Al Haouz Province, roughly 70 kilometers (43.5 miles) south of Marrakech.

The USGS said the epicenter was 18 kilometers (11 miles) below the Earth’s surface, while Morocco’s seismic agency put it at 8 kilometers (5 miles) down. In either case, such shallow quakes are more dangerous.

Earthquakes are relatively rare in North Africa. Lahcen Mhanni, Head of the Seismic Monitoring and Warning Department at the National Institute of Geophysics, told 2M TV that the earthquake was the strongest ever recorded in the mountain region.

In 1960, a magnitude 5.8 tremor struck near the Moroccan city of Agadir and caused thousands of deaths.

The Agadir quake prompted changes in construction rules in Morocco, but many buildings, especially rural homes, are not built to withstand such tremors.

In 2004, a 6.4 magnitude earthquake near the Mediterranean coastal city of Al Hoceima left more than 600 dead.

Friday's quake was felt as far away as Portugal and Algeria, according to the Portuguese Institute for Sea and Atmosphere and Algeria's Civil Defense agency, which oversees emergency response.