ISIS have continued to suffer losses as Syrian government warplanes maintain their bombardment of the group's strongholds.

At least 38 ISIS fighters have died over the last 24 hours as the Assad government has led airstrikes against the group in Palmyra and two other towns in the Homs province, according to Aljazeera.

The Syrian air force has been increasing attacks as it has received reinforcements and equipment from Russia, a monitoring group said.

"The number of raids is growing and the strikes are more precise after the Syrian air force received arms and more efficient planes from Moscow," said Rami Abdelrahman, director of the Syrian Observatory of Human Rights.

However many civilians were also killed and injured in the strikes, the British-based observatory said in a statement today.

At least 12 civilians were killed and tens of others injured in the intense aerial bombing in Palmyra. Many of the wounded are dying due to a lack of basic medical supplies in the city, the group said.

There is only one civilian doctor working in a single field hospital in Palmyra meaning many wounded have to be transported to the city of Al-Raqqah, an ISIS stronghold.

The ancient Syrian city of Palmyra has been under ISIS control since May 20  2015. The group has committed many atrocities in the city including beheading Khaled al-Asaad, the archaeologist and historian who maintained and watched over Palymra's extensive cultural artefacts. He was accused of "apostasy" and his death was followed by the destruction of the 2,000 year old temple of Baalshamin.