Many civilians were killed by a chemical bomb attack Tuesday morning in the town of Khan Sheikhoun in Syria.

The horrific air attack killed 70 people, including innocent children and infants. Many survivors testified that they saw warplanes dropping chemical bombs.

According to the The New York Times, some of the victims were choking, writhing, gasping or foaming at the mouth after inhaling banned chemicals and nerve agents. Some of the rescue workers also felt sick and collapsed after handling the victims.

The Syrian regime denied that the government was responsible for the chemical attack. Syrian President Bashar al-Assad stated that the attack happened at dawn while many were still asleep.

The Russian Defense Ministry even backed the statement of Assad on its Facebook page. It stressed that the incident was due to an air attack that battered a terrorist-operated chemical weapons factory. The Russian government gained world condemnation because of its statements that support Assad's claims.

However, many survivors contradicted Assad's statements. Some of them said that the air strike happened around 6:30 a.m. on Tuesday. Some of them even said that they saw colors blue and yellow coming from the bombs before they felt dizzy and fainted.

The World Health Organization said in a statement that the survivors are showing symptoms like they were exposed to a nerve agent.

Amnesty International mentioned in a press release that the bombs are more likely to be containing sarin gas.

Chemical weapons expert Dan Kaszeta told CNN, "Nerve agents are the result of a very expensive, exotic, industrial chemical process — these are not something you just whip up. He added, "It's much more plausible that Assad, who's used nerve agents in the past, is using them again."

Assad has been known for using gas bombs during previous military operations in Syria.

U.S. President Donald Trump said that the chemical attack is a serious violation to humanity, adding that the moves of the Syrian regime are unacceptable.

The U.N. emergency meeting on Wednesday made no resolutions about the issue.