Two Palestinian refugees were reported killed and a third seriously injured in Al-Yarmouk refugee camp in Syria on Monday morning, according to witness accounts.

Palestinians in the camp said a barrage of shells hit a home in the al-Hajar al-Aswad neighborhood of al-Yarmouk, in Damascus.

The casualties were identified as Fadi al-Thahir and his wife Rawaa Muhammad Saadi, refugees who originally come from Tiberias. The couple’s four-year-old son was also seriously injured, according to al-Yarmouk News, a Facebook page reporting on events in the camp.

Last Wednesday, a 51-year-old Palestinian man was killed by a shell in the same camp, the largest in Syria.

Around 400 Palestinians have been killed in Syria so far, mostly by snipers, Palestinian official Mohammad Shtayyeh said in early August.

Syria is home to nearly 500,000 UN-registered Palestinian refugees. An additional 120,000 Palestinians reside in Syrian cities.