There could be a spike in violence after former members of the Kobe Yamaguchi-gumi went their own way.
The suspect, who has not been named, has been arrested by police.
Ray Bray denies sending the Islamophobic tweets from his account.
The shooter died from a self-inflected gunshot wound.
Police confirmed the arrests were linked to an earlier raid in Harlesden Road, Willesden.
A manhunt has been launched by Dorset Police.
The latest incident is among a series of killings linked to cow vigilantism reported in the country.
One woman was killed and 6 others were injured during the shooting in a San Diego apartment complex.
The 22-year-old was also charged for possession of drug paraphernalia.
Judge orders Jacob Malone to register as sex offender for 15 years.
Google, Twitter and Facebook may face prosecution for failing to tackle online terrorism, violence and child abuse.
Six other people were also arrested as part of the ongoing counter terrorism investigation.
The girl, who was attacked in Middlesbrough at 3am, is in hospital in a critical condition.
Qatari Badr Hashim Khamis Abdallah al-Jabr killed Lauren Patterson, 24, from Kent, in 2013.
Saeed Karimian, 45, founded Persian language Gem TV in London in 2007 and was sued by Iran.
Susan Garside, 53, from Liverpool, called herself 'Summer Blackvelvet' on an adult sex work site.
The 86-year-old's also revealed he made £13 in royalties in the six months after his convictions.
Kate and Gerry McCann said there is no evidence Madeleine was dead.
The 48-year-old suffered a 'violent and sustained attack' on the top deck of a Route 189 bus.
Four children aged under five were rescued from the house in Withywood, Bristol.
Fifa council member was identified during court proceedings against audit committee member Richard Lai.
Akeem Samuels used Instagram to call for the murder of non-Muslims.
An Airbus A320 flying at 5,500ft came close to two drones in the skies above east London in November 2016.
Paterson was found guilty of 17 counts of wounding with intent.
29-year-old Jessica Galyon had allegedly pursued the 16-year-old boy on Facebook.
Mohamed Amoudi, 21, was snatched in anti-terror raid in north-west London on 27 April.
Ian Paterson convicted of intentionally wounding patients between 1997 and 2011.
Four-year sentence for children's TV presenter John Earle who abused youngster while deputy headteacher.
Armed robbery at Kansas sandwich shop leaves staffer at till unmoved despite being held up at gunpoint.
Ming Jiang murdered Yang Lui and dumped dismembered body in a suitcase on remote Pennines road.