There was significant damage in Enid, a city of about 50,000 people, according to local reports.
At least 10 people were injured as tornadoes struck parts of northern Oklahoma, according to local reports.
Emergency crews conducted search and rescue operations after significant destruction was caused in the city of Enid.
Videos show debris flying into the air as the tornadoes damaged properties and infrastructure.
The US president's message that both sides "must take their time" with negotiations comes as reports suggest an agreement is close.
Officers stormed the building days after the party vowed to defy a court ruling removing its leaders.
A search operation has so far rescued 24 people with no deaths reported at the site, in a city near the capital Manila.