Muslim groups reacted with a mixture of shock and scepticism at the announcement by police that they had broken up a major terrorist plot to bomb airliners.
Khurshid Ahmed, a member of the Commission for Racial Equality in Birmingham where some of arrests took place, expressed relief that an attack had been foiled.
"The response here is one of shock that we still find young people actively involved in activities which we would condemn as a society and also a sense of relief that a possible attack has been thwarted," he said.
He praised the police for alerting him in advance of the announcement so that he could explain to local community what was happening.
However Fahad Ansari of the Islamic Human Rights Commission said that many Muslims would be sceptical about the police statement.
In the past high profile arrests - such as the Forest Gate raid or the alleged plot to bomb Old Trafford football stadium - had failed to produce any evidence of terrorist activity.
"I think you will get cynicism from the community," he said.
"Over the last few years we have seen many high profile raids like this plastered over the press to terrify the public.
"We have seen it time and time again. It has been hit and miss on too many occasions. It is causing a lot of mass hysteria."
He suggested that the raids could even have been timed to distract attention from the criticisms of the Government's stance on the Lebanon crisis.
Birmingham Labour MP Khalid Mah-mood appealed to local communities to help provide as much extra information as possible to help the police thwart the terrorists.
He said he believed the arrests were based on "fairly good intelligence".
Dr Mohammad Naseem, chairman of Birmingham Central Mosque, said he remained circumspect about the basis on which yesterday's arrests were made.
Dr Naseem said worshippers at Birmingham Central Mosque were "frustrated and saddened" at the news of the raids.
He said: "With the track record of the police, one doesn't have much faith in the basis on which people are detained."