President Donald Trump released a statement Tuesday blaming a chemical attack in Syria on the Obama administration’s policies.

Dozens of people were reportedly killed on Tuesday when a hospital treating civilians injured in chemical attacks was bombed. Activists described the attack as among the worst in the country’s six-year war.

“Today’s chemical attack in Syria against innocent people, including women and children, is reprehensible and cannot be ignored by the civilized world,” Trump said in a statement. “These heinous actions by the Bashar al-Assad regime are a consequence of the past administration’s weakness and irresolution.”

Trump cited President Barack Obama’s inaction after issuing a “red line” in 2012 that suggested that the US would intervene militarily if the Assad regime used chemical weapons.