Explosive packages found at Heathrow, Waterloo and London City Airport

The "small improvised explosive devices" were found in A4 postal bags, the Metropolitan Police said.

The Met's Counter Terrorism Command is treating it as a "linked series" and "keeping an open mind regarding motives".

No-one has been hurt, the force added.

The Compass Centre in Heathrow's grounds was evacuated after a package was reported to police at about 09:55 GMT.

The device set alight when staff opened the bag, the Met said.

https://www.bbc.com/news/uk-england-london-47457477?ns_campaign=bbc_breaking&ns_source=twitter&ns_linkname=news_central&ns_mchannel=social