Canadian police have arrested an American biochemistry professor at an Ottawa hotel over an alleged chemical threat that prompted authorities to evacuate the building.
"We apprehended a male at the Chimo hotel without incident," a police spokeswoman said.
"He is being held on a Canada-wide warrant issued relating to charges in Nova Scotia province."
Earlier, police evacuated the hotel and brought in hazmat and tactical squads, after reportedly receiving a tip from the man's wife that he had travelled from Halifax to Ottawa in a van packed with dangerous chemicals.
The man's vehicle has also been located, police confirmed.
Local media identified the suspect as American national Christopher Phillips, and said he is a professor at a university in Halifax where he lives with his family. They also said he was once a biochemical weapons expert for the US military.
Ottawa police Constable Chuck Benoit told reporters a police negotiator contacted the suspect at the hotel at around 9am local time.