A 17-YEAR-OLD boy has been arrested in connection with last week's terrorist attack on a tube train in west London.
The teenager was arrested at an address in Thornton Heath in South London at 12.05am this morning, the Metropolitan Police have confirmed.
Following his arrest, police officers began a search of the property.
Six men have now been arrested in connection with the ongoing investigation into the explosion, which took place on a tube carriage at Parsons Green Tube Station at 8.20am on Friday, September 15.
An 18-year-old man was arrested by Kent Police in the port area of Dover at 7.50am on Saturday, September 16.
A 21-year-old man was arrested in Hounslow on September 16.
A 25-year-old man was arrested at an address in Newport, South Wales on Tuesday, September 19.
A 45-year-old man and a 30-year-old man were arrested on Wednesday, September 20 at a second address in Newport.
All six men are currently in custody at a south London police station.
Commander Dean Haydon, head of the Met Counter Terrorism Unit, said: "This continues to be a fast-moving investigation.
"A significant amount of activity has taken place since the attack on Friday. We now have six males in custody and searches are continuing at five addresses. Detectives are carrying out extensive inquiries to determine the full facts behind the attack."
Regarding the ongoing investigation, he added: "We are asking teh public to look out for anything that seems out of place, unusual or just doesn't seem to fit in with day-to-day life. it may be nothing, but if you see or hear anything that could be terrorist-related, trust your instincts and call us."
Anyone with information should call the Metropolitan Police on 0800 789 321 or, in an emergency, call 999.