Muhammad Daloul and Bassam Fahmi Tamim were killed on Friday after a mosque in Damascus was attacked, the working group for Palestinians in Syria said.
Muhammad Jadallah Abu Madi was killed in Yarmouk refugee camp on Thursday, the group added. It is not immediately clear who was responsible for the attacks.
The body of a Palestinian boy was also found in al-Husayniyya refugee camp on Thursday. The camp had reportedly been shelled the previous night.
In Homs, a mortar shell landed in al-Aedin refugee camp Friday injuring three Palestinians, the working group said. Camp residents already suffer from severe fuel shortages and high food prices and electricity in the camp is continuously interrupted.
In Yarmouk camp, several mortar shells hit a mosque in Palestine street Friday causing material damage, the Palestinian working group said. Two shells also landed near a girls school in the camp, with no injuries reported.
Refugees in Yarmouk also held a sit-in strike at the main entrance to the camp demanding the return of refugees who were forced to flee fighting. Syrian government forces dispersed the protest.
In An-Nayrub refugee camp east of Aleppo on Friday, the Free Syrian Army detained 20 Palestinian refugees, the working group said. Opposition forces also released a Palestinian refugee they had detained two weeks ago.
In early March, the Action Group for Palestinians of Syria said in a statement that around 1,038 Palestinians had been killed in the 22-month Syrian conflict, which has claimed the lives of around 70,000 people and created hundreds of thousands of refugees.
Syria hosts half a million Palestinian refugees, descendants of those admitted after the creation of Israel in 1948, and has always cast itself as a champion of the Palestinian struggle, sponsoring several guerrilla factions.
SPECIAL TOPIC – PALESTINIAN REFUGEES