"During the 'humanitarian pause' fighters from armed groups continued attacking the positions of the government forces in the areas of Hazrama and Nashabia settlements and after 1 pm went on the offensive in other directions too," the ministry said in a statement.
"These actions were accompanied by intensive artillery fire and small arms fire."
Moscow also accused fighters of firing mortar shells at a humanitarian corridor in the area between Harasta and Douma.
"Mines exploded 500 metres from a checkpoint," the statement said.
The United Nations said earlier today that fighting has raged on in the area making relief operations impossible.