Hamas reacted to U.S. President Donald Trump's speech in Saudi Arabia Sunday, saying it rejects his description of the Gaza-based group as a terrorist organization.

Senior Hamas official Mushir al-Masri said Trump's remarks showed "complete bias" toward Israel, "the occupier and its policies."

>> FULL TRANSCRIPT: Read Trump's full speech in Saudi Arabia to the Muslim world >>

In his speech at a summit of leaders from Arab and Muslim countries, Trump included Hamas in a list of terrorist groups posing a threat to countries around the world.

"Some estimates say that more than 95% of the victims of terrorism, are themselves Muslims," said Trump. "It is a tragedy of epic proportions. No description of the suffering can begin to capture its full measure. ISIS, Al-Qaida, Hezbollah, Hamas - it must be counted not just in the number of dead, but in generations of vanished dreams."

Reuters contributed to this report.