UK intel launches internal probe on Manchester attack warnings

Britain's MI5 intelligence service launched an internal inquiry on May 29 into whether vital clues were missed in the run-up to the Manchester suicide bombing, as police arrested another man in connection with the attack.

The developments come a week after 22-year-old Salman Abedi, a British-born university dropout of Libyan origin, detonated his device outside a pop concert by teen idol Ariana Grande, killing 22 people including six children under the age of 18.

A 23-year-old man was arrested in the southern coastal town of Shoreham-by-Sea, more than 400 kilometers from Manchester on Monday over the attack claimed by the Islamic State of Iraqa and the Levant (ISIL).

That brings the total number of people now detained on U.K. soil to 14, all of them men, while Abedi's father and brother have been held in Libya where officials said the two brothers were ISIL jihadists.

MI5 is looking at decisions taken in the case of Abedi, who used to be on a terror watch list but was no longer on it at the time of the attack, and whether warnings about his behavior were ignored amid mounting criticism of the security services.

"There is a lot of information coming out at the moment about what happened, how this occurred, what people might or might not have known," Home Secretary Amber Rudd told Sky News.

"It is right that MI5 take a look to find out what the facts are," she said, adding: "We shouldn't rush to make any conclusions at this stage."

Two people who knew Abedi made separate calls to an anti-terrorism hotline to warn the police about his extremist views, British media have reported.

The BBC also said that Abedi had taken part in the armed uprising against Libyan dictator Moamer Gadhafi's regime as a...