"My thoughts & prayers are with the families & loved ones of those who lost their lives in the cowardly attacks in France, Kuwait & Tunisia," he tweeted.
"The progress of humanity lies in peace, brotherhood & non-violence, not in hatred, terror & mindless violence against others," he added.
He was commenting on terror attacks in which over 50 people were killed in Kuwait, Tunisia and France.
In Kuwait, a suicide bomber blew himself up during Friday prayers at a Shiite mosque in the capital Kuwait City, killing 25 people and wounding over 200 others.
In France, a suspected Islamist launched a daylight raid on a gas factory in an eastern part of the country, pinning a decapitated head to the gates and injuring at least two others with explosive devices.