A five-year old Syrian girl has been killed by terrorists fighting in Syria's northwestern province of Idlib.

According to the website of Lebanon’s al-Manar’s television network, Rital Hajj Hussein died on Saturday when terrorists shelled the town of al-Foaa, located in Idlib’s northern countryside.

Four other people were injured in the attack which was lunched despite a ceasefire being in place in the country.

Syria is currently observing a ceasefire brokered by Russia and the US, which entered into force on February 27. The truce, which was reached between the Syrian government and dozens of militant groups operating in the country, does not apply to the Daesh and al-Nusra Front terrorist groups.

However, renewed violence in some parts of Syria, particularly around Aleppo, has left the ceasefire in tatters and torpedoed peace talks on the conflict.

Syria's official SANA news agency also reported that one civilian was killed and six more wounded in a terrorist rocket fire in the northwestern province of Aleppo on Friday.

Meanwhile, Syrian and Russian jets have targeted the terrorists' last remaining supply route in Aleppo located in the city’s eastern regions.

Aleppo has been divided between government forces in the west and militants in the east since 2012, a year after the conflict broke out in Syria.      

Syria has been gripped by foreign-backed militancy since March 2011. UN special envoy for Syria Staffan de Mistura estimates that over 400,000 people have been killed in the conflict, which has also displaced over half of the Arab country’s pre-war population of about 23 million.