News reports, citing unidentified sources, said the alleged plot was to kidnap, torture and behead a Muslim British soldier.
West Midlands Police say they have completed searches of 18 properties raided last week, the AP reports.
The suspects, detained on suspicion of the commission, instigation or preparation of acts of terrorism, are being held in Coventry in central England.
Eight of the suspects were arrested in early-morning raids on Wednesday, and the ninth was arrested later in the day.
Putin's official spokesman Dmitry Peskov commented on remarks in the US media about failures in launching nuclear-capable missiles in Russia
More than 5.8 million people voted for Nicholas Maduro at the presidential election in Venezuela. This is more than a quarter of registered voters. Why did those people vote for the man, who, as Western media write, took Venezuela to the brink of collapse?
It has long been understood that the West has been trying to subject Russian borders to total control. We have not seen such activity even during the Cold War