ANTI-TERROR police arrested nine men in dawn raids on two addresses in south London today.
The arrests were in connection with the investigation into last week's botched London bombings.
Six of the suspects were arrested at one property in Tooting and three at another in the same area.
It is not thought any of those held are the three bombers still on the run after last Thursday's failed attacks.
Police said the suspects had been taken to a central London police station.
Police cordoned off a road in Tooting following the two raids. Dozens of police stood guard opposite Tooting Broadway Tube station, which stayed open.
Around the corner, two police vans full of officers were parked in front of a halal kebab and hamburger bar, which was also cordoned off.
The owner of a grocery shop next to the burger bar said three Turkish men had been arrested from there.
Raja Kumar, 28, said: "We're a 24-hour shop. Dozens of police came to raid the shop next door at 4.30 this morning. They told us to stay inside and then they took away three people.
"They were a man aged about 45 called Ali, who has been living there for two years, and two men aged about 28 and 26."
Meanwhile in Stockwell, London, where three women were arrested last night on suspicion of harbouring offenders, armed police remained on guard at a block of flats.
* Police today launched a major reassurance and deterrence operation on the rail system.
A spokesman said: "In terms of the rail system, this is the largest deployment of police."
The operation involved police at stations and on trains.