A Scot has told of his horror after a colleague was killed in a mass shooting at a nightclub in the US.

Michael O'Hara, who moved from Glasgow to Orlando in Florida last year, has revealed one of his workmates was shot dead in Sunday's massacre at a gay nightclub in the city.

Another of his colleagues remains in hospital.

In total, 50 people were murdered in the mass killing, the worst in US history.

A further 53 people are wounded in hospital after the attack  at Pulse nightclub in the early hours of Sunday.

Omar Mateen burst into the LGBTI venue and opened fire while armed with an assault rifle and handgun before taking hostages.

He was shot by police at the nightclub after a three-hour stand-off.

Mr O'Hara, whose home is walking distance from Pulse, told STV News he had returned home from work at the Universal Studios theme park at around 11.30pm.

He said he heard the sound of sirens in the early hours of the morning before waking up to the news of the tragedy.

The Glaswegian said: "I live very close to it (the nightclub) and I frequent the Dunkin' Donuts and Wendy's right next to it with my wife and family.

"I was outside my house after returning home from work as I went in and put a washing on for my clothes for my next shift, my wife was asleep at the time, I could hear faint noises in the background.

"I woke up in the morning and there were helicopters overhead and police everywhere. I found out that one of my work colleagues at Universal was there and had been killed.

"Then I found out that another co-worker had also been shot and is in hospital but I don't know his condition yet.

"It's terrifying. Every single street here is on lockdown. Knowing it's close to where my kids go to school is absolutely terrifying."

His wife, McKenzie O'Hara, 29, added: "After it happened there was just this feeling of foreboding. You can see it on the faces of the people in the area. Lots of the businesses here have closed as well.

"There was a candlelit vigil and also lots of people have started giving blood to help the people in hospital."