US presidential candidate Donald Trump has used the Paris tragedy as an opportunity to promote his view of foreign policy.
"They laughed at me when I said to bomb the ISIS controlled oil fields," he tweeted.
"Now they are not laughing and doing what I said."
He later expressed his condolences for the victims.
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"My prayers are with the victims and hostages in the horrible Paris attacks," he said.
Other US presidential candidates have expressed their condolences and extended prayers.