London, July 5 (IANS) Six people, one of them a woman, suspected to be involved in terrorism offences were Thursday arrested in London in a “significant” operation led by British intelligence agency MI5, BBC reported.

The report said the arrests are related to a possible plot involving Islamist extremists, with potential British targets.
However, they were not linked to the Olympics or Paralympics, police said.
Some of those arrested on suspicion of preparation or instigation of acts of terrorism are British nationals.
They include a 21-year-old man and a 30-year-old woman, who were detained at separate addresses in Ealing, west London.
A 29-year-old man was also arrested in Ealing, while three other men, aged 18, 24 and 26, were detained in Newham, east London.
Security sources described the arrests as “significant”.
Britain’s terror threat level is still “substantial”, which means a terrorist attack is a “strong possibility”.
There are two higher levels – “severe”, meaning an attack is “highly likely”, and “critical”, meaning an attack is “expected imminently”, BBC said.