A SOUTHAMPTON-born Royal Marine was killed by a makeshift explosive as he stepped off a secured path on patrol in Afghanistan, an inquest heard today.

Alexander Lucas, 24, of 45 Commando Royal Marines, died in November last year while working with the country's National Army to rid Kajaki of improvised explosive devices (IEDs).

None of his comrades witnessed him step on the device, but all heard a “loud explosion” as Marine Lucas left a compound his section had been securing on his own, the inquest at Wiltshire Coroner's Court heard.

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His company commander Major Nigel Somerville said: “Everything was going to plan until I heard the explosion. Through communications we heard the enemy was aware there had been an explosion and it was their guess there had been a casualty.

“It was not long after that the enemy opened fire - a considerable degree of heavy fire.”

Maj Somerville said the fire was coming in from four or five different positions in the surrounding area, as the men attempted to evacuate wounded Marine Lucas.

Maj Somerville added the men who carried Marine Lucas on a stretcher across open ground under fire showed “exceptional bravery”.

Marine Lucas was evacuated by Chinook helicopter to Camp Bastion where he was pronounced dead.

Wiltshire Coroner David Ridley recorded a verdict of unlawful killing.

Born in Southampton, Marine Lucas lived in Peebles.

He was due to marry his fiancee Jill next month. He also leaves behind a young daughter, Cara.

His father Adrian said: “Alec was a deeply loved son and brother, who was devoted to his fiancee and daughter. He brought so much happiness to all who met him and was described by close friends as a fantastic role model. He will be deeply missed and cherished by all who knew him.”