Tour de France: Chris Froome strengthens his grip on the yellow jersey on a sombre day after Nice attack

Dutch rider Tom Dumoulin won the stage 13 time trial from Bourg-Saint-Andeol to La Caverne du Pont d'Arc while Froome set the second-best time to add another minute to his cushion

Chris Froome continues his dominance on Friday (Getty)

Chris Froome strengthened his grip on the yellow jersey on a sombre day at the Tour de France.

Dutch rider Tom Dumoulin won the stage 13 time trial from Bourg-Saint-Andeol to La Caverne du Pont d'Arc while Froome set the second-best time to add another minute to his cushion over second place.

But Froome, a Monaco resident, had little interest in discussing the race, which took place in the wake of the terrorist attack which killed at least 84 people in Nice on Thursday night.

Although he attended the yellow jersey holder's customary press conference after the stage, the Briton took no questions and instead gave a short statement.

"I think it's pretty clear today everyone's thoughts are with those affected down in Nice," Froome said. "I think it's difficult for us to even be here talking about the race with all that happening yesterday down in Nice.

"It's somewhere pretty close to home for me, somewhere I do a lot of training, and to see the promenade the way it was yesterday evening with bodies over the road is horrific, horrific scenes.

"My deepest sympathy, my deepest condolences go out to those families who have lost loved ones in Nice."