But the official did not rule out the possibility that someone else might have set it.
The officials did not rule out the possibility of a future visit, however.
She's not strong enough yet to rule out the possibility of suicide.
But the officials did not rule out the possibility of a compromise.
But he did not rule out the possibility of entering the race later.
But that does not rule out the possibility of trouble.
But neither did he rule out the possibility of another run.
Today the army did not rule out the possibility that one of its soldiers had killed the boy.
He did not rule out the possibility of more job cuts.
At a news conference later, he did not rule out the possibility of eventually taking another job in the administration or running for office.