Warplanes and helicopters of the Syrian regime have carried out a total of 11,017 attacks, resulting in 2,314 deaths, from the beginning of 2015 until the end of April, the Syrian Observatory for Human Rights, or SOHR, announced on Tuesday.

At least 1,606 of the victims were civilians: 369 children, 255 women and 982 men.

An estimated 708 of the fatalities were rebel fighters from the Islamist militias al-Nusra Front, the Al-Qaeda affiliate in Syria, and Islamic State.

More than 13,000 people were wounded during the bombings, which hit targets in 13 of the country's 14 provinces.

A total of 5,934 barrel bombs were dropped by helicopters, while 5,083 were carried out by warplanes.

SOHR appealed to the U.N. Security Council "to assume its responsibilities and work on using its power in order to stop the daily killing committed against the Syrian people and destroying their social structure, coexistence, past, present and future by using all kind of weapons."