Counter-terror police have launched a probe after a suspicious package was found on a train at North Greenwich tube station.
Police tasered a man as he walked down a street as they made an arrest over the planting over a "viable device" on a London Underground train earlier this week.
The station, which was evacuated and closed by officers, reopened shortly after 6pm.
The police department said the house was evacuated and officers from the local force and the anti-terrorism squad were "dealing with the item".
Scotland Yard refused to comment on the report.
In a statement, a spokesperson for Devon and Cornwall police said: "On Saturday, 22 October, officers from the Metropolitan Police attended an address in Tudor Road, Newton Abbott".
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His arrest comes after North Greenwich station was put on lockdown for eight hours when a suspect item was found inside a packed train on Thursday. It was unsophisticated and the suspect has been detained under terrorism legislation covering the "commission, preparation and instigation" of a violent act.
Police urge anyone who may have seen anything suspicious on the Jubilee Line or anywhere else to call the Anti-Terrorist Hotline on 0800-789321.
Since August 2014, the terror threat level in Britain has been classed as "severe" - the second highest level, meaning an attack is considered "highly likely".
I have been in constant contact with the Metropolitan Police Commissioner and the TfL Commissioner throughout the past two days.
'Following discussions with the police, The O2 remains open and tonight's Nickelback performance will go ahead as planned'.