Associated Press report that:
U.S. intelligence officials say questions remain about whether the attack could be linked to Syrian President Bashar Assad or high officials in his government.
The report goes on:
- Obama did not present any direct evidence to back up his assertion that the Syrian government bears responsibility for the attack.
- U.S. officials were searching for additional intelligence to bolster the case for a strike against Assad’s military infrastructure
- And to rule out the possibility that a rogue element of the Syrian military could have used the weapons on its own authority