(dpa) - British police have arrested a 19-year-old man on suspicion of terrorism and carried out a controlled explosion of materials found at his home, police said Friday.
Anti-terrorism police in charge of the operation in Bristol, south-west Britain, said the arrest followed a tip-off from the intelligence services and had been made "to prevent harm."
The controlled explosion was carried out in the early hours of Friday morning, requiring some 30 people to be moved from their homes as a precaution.
"This is likely to be a prolonged, complex and sensitive inquiry," deputy Bristol police chief Jackie Roberts said.
Residents, warned in advance of a "heavy police presence" in their neighbourhood, reported being woken by a "dreadful bang."
One described the man who lived in the bungalow raided by police as "the only Muslim man who lived here."
However, police remained tight-lipped about the background to the operation.
Farooq Siddique, of the Bristol Muslim Cultural Society (BMCS), said he hoped the arrest would "prove to be a false alarm."
Community relations in the area had been "very good," he said.