A number of states, including Australia, Israel, Saudi Arabia, Turkey and the United Kingdom have already expressed their support for the attack, while Russia called the US actions in Syria an aggression against a sovereign state based on an unjustified reason.
"The US missile attack on a Syrian government air base risks escalating the war in Syria still further," Corbyn said, as quoted by the press service of the Labour Party.
Corbyn noted that the chemical attack, which killed 84 people, according to the World Health Organization (WHO), required a thorough independent investigation, whereas unilateral, unauthorized steps would only exacerbate the situation.
"Tuesday’s horrific chemical attack was a war crime which requires urgent independent UN investigation and those responsible must be held to account… But unilateral military action without legal authorisation or independent verification risks intensifying a multi-sided conflict that has already killed hundreds of thousands of people," Corbyn said, as quoted by the press service.
Following the Idlib incident, the United Nations and the Organisation for the Prohibition of Chemical Weapons (OPCW) launched an investigation.
The US missile attack late on Thursday claimed the lives of 10 people, an officer of the Syrian Armed Forces told Sputnik. The Russian Defense Ministry said that the attack left two Syrian servicemen missing, four killed, and six suffering severe injuries from the fire. Homs Governor Talal Barazi said earlier on Friday that at least two civilians from a nearby village and five Syrian servicemen were killed.