Kerry says Syria planned for attack

The Syrian regime spent days carefully preparing to launch a chemical weapons attack, US Secretary of State John Kerry has said.

Based on intelligence, Mr Kerry said Syrian regime personnel were at the site of the attack for three days beforehand, making preparations.

He said regime elements were told to prepare by putting on gas masks.

The US also says it knows where the rockets were launched from. Mr Kerry said they came from regime-controlled areas.

He said a senior regime official confirmed that the weapons were used and was afraid it would be discovered.

The US is releasing a public report on intelligence gathered about last week's deadly attack. President Barack Obama is preparing for a possible military strike in response.