Public Safety Minister Ralph Goodale is assuring Canadians that police and security agencies are 鈥渂eing prudent and vigilant鈥� in light of Wednesday鈥檚 attack outside the U.K. Parliament.

But Goodale said there is 鈥渘o basis鈥� for changing the national threat level, which has remained at 鈥渕edium鈥� since the fall of 2014.

鈥淲e are obviously monitoring all factors to make sure that stance remains appropriate, but we have no reason at this moment to change the Canadian position,鈥� Goodale told reporters in Ottawa Wednesday. 鈥淭hat assessment is always under constant review and examination.鈥�

Goodale said the Canadian government has offered 鈥渆very measure of assistance and support鈥� to the United Kingdom as authorities there investigate what was believed to be a terrorist attack.

鈥淎ll of our thoughts and concerns and prayers are with people in London and people of the United Kingdom and especially the victims who have lost their lives and their families and loved ones,鈥� Goodale said. 

During question period in the House of Commons Wednesday, Prime Minister Justin Trudeau said the attack on 鈥渢he symbol and seat of democracy is a cowardly and reprehensible act that we condemn in the strongest terms.鈥�

鈥淐anada and the U.K. are close friends and allies and our message to the citizens of the United Kingdom and our colleagues in the British Parliament is simple: We stand with you,鈥� he said.

Interim Conservative leader Rona Ambrose called the attack 鈥渢ragic鈥� and 鈥渁 sad day for the world.鈥�

鈥�In light of the terrorist attacks in London, I would like to offer on behalf of the Official Opposition our sincere condolences to the victims and to all those who have been touched by this tragedy,鈥� she said.

NDP Leader Tom Mulcair also said his party鈥檚 thoughts and prayers are with the people affected by 鈥渢his terrible tragedy, this senseless attack in London.鈥�