On 7 April 2018, a chemical attack was reported in the city of Douma, with 70 people killed and 500 injured. On-site medics stated the cause of those deaths was exposure to chlorine and sarin gas. The Syrian Ba'athist government denied any use of chemical weapons. Following the incident in Douma, the UN Security Council failed to adopt three competing resolutions on an inquiry into the alleged chemical attack, with Russia and the U.S. clashing over the issue. Following the incident, Syrian Ba'athist government forces entered and established control over the city of Douma, ending the five-year Siege of Ghouta.