European Union member states must implement anti-terrorism measures to combat a permanent threat to citizens' safety, the EU executive said, expressing solidarity with Britain after a today's wave of attacks.
Four small explosions or attempted explosions hit London without causing major casualties or major damage just 2 weeks after suicide bombers killed more than 50 people.
"This second attack unfortunately confirms that terrorism constitutes a permanent threat from which nobody is safe," the European Commission said in a statement.
"We will continue to encourage member states to do everything they can to implement the anti-terrorism measures which were agreed upon at EU level.
The Commission said the incident "seems to be yet another terrorist attack on London, the UK, Europe and indeed our democracy," and expressed solidarity with the victims .
The EU vowed earlier this month to speed up anti-terrorism measures such as the compulsory storage of phone and Internet usage records in the wake of the London suicide bombings.