Flowers are laid at the scene after an attack on Westminster Bridge in London, Britain, March 22, 2017. [Photo/Agencies]

President Xi Jinping sent condolences on Thursday to Britain's Queen Elizabeth following the terror attack in London.

In the message to the queen, the president strongly condemned the attack, and offered his profound condolences and sincere sympathy to families and loved ones of the victims and the injured.

Xi said terrorism is the common enemy of the international community and China is firmly opposed to terrorism of any form.

China is willing to strengthen cooperation with the United Kingdom and the international community, and will strive to safeguard the security of both countries and the world at large, he said.