By James Rush PUBLISHED: 14:06 EST, 31 July 2013 | UPDATED: 19:32 EST, 31 July 2013 A Sikh gang was today convicted of slashing a retired Indian general’s throat in a revenge attack for a military operation nearly 30 years ago which left at least 500 dead. Lieutenant General Kuldip Singh Brar, 78, was attacked as he walked with his wife Meena, in Old Quebec Street, central London, on September 30 last year. Lt Gen Brar was involved in a controversial military operation - Operation Blue Star - against Sikh militants in Amritsar, north west India, in June 1984.
@highlight
Lieutenant General Kuldip Singh Brar was attacked in London last year
@highlight
He was involved in Operation Blue Star against Sikh militants in 1984
@highlight
Operation in Amritsar, north west India, left at least 500 people dead
@highlight
Two men and a woman have now been found guilty of wounding with intent
@highlight
A third man had already admitted the charge
Lt Gen Brar, speaking via a videolink from @placeholder, said as a result of the attack his protection ranking was raised to the highest possible in India.