Dutchman Tom Dumoulin is the fastest as Chris Froome extends lead in the first time-trial

Chris Froome turned the screw on his Tour de France rivals when he took second place in Friday's individual time trial behind Tom Dumoulin amidst heightened security following the deadly Nice terror attack.

VALLON PONT-D'ARC, July 15th: Organisers had debated whether the stage should be cancelled and officials observed a minute's silence before the first rider went down the ramp. There was another minute of silence at the podium ceremony after the stage.

Dutchman Tom Dumoulin (Giant-Alpecin) clocked 50 minutes 15 seconds, beating Froome by 1:03.

The Briton, however, extended his overall race lead to 1:47 over Dutchman Bauke Mollema (Trek-Segafredo), who moved up to second but lost 51 seconds to the Team Sky rider.

Froome's compatriot Adam Yates (Orica-Bike Exchange) dropped from second to third, 2:45 off the pace after battling strong head and crosswinds.

Colombian Nairo Quintana (Movistar) lost 2:04 on the day to Froome, to slip from third to fourth overall, 2:59 off the pace ahead of a gruelling final week in the Alps.

The 13th stage of the signature event of the country's sporting summer began with its publicity caravan - usually playing loud music to energise the thousands lining the route - silenced for the day.

A gunman at the wheel of a heavy truck ploughed into a crowd celebrating France's national day in the southern city of Nice late on Thursday, killing at least 84 people and injuring scores in what President Francois Hollande called a terrorist act.

"I woke up this morning and learnt something terrible had happened. It's an extremely sad day. So it was a stage with two sides," said Dumoulin following his second stage win of the Tour after he prevailed in a mountain-top finish at Arcalis, Andorra last Sunday.

"There was a question this morning whether we could start. And I think it was right to go on racing. It's horrific what happened but we cannot let terrorists decide on how we should be living."

"Two hours before my start it was decided to race and I decided to do everything I could to race well because that's the only thing I can do. I did a very good TT (time trial). I did a good time. I cannot say anything about the others. It was a very good TT for me personally."

Froome lacked the juice to beat time trial specialist Dumoulin but showed no ill effects of Thursday's 12th stage crash when he retained the yellow jersey thanks to a jury decision that cancelled the time he and Porte had lost in the incident.

Saturday has the competitors moving on to a 208.5-kilometer, mostly flat stage that should favor sprinters, before the race returns to the mountains for some gruelling stages in and out of Switzerland next week.

Top 20 Stage 13 Indivdual Time Trial Results

1 Tom Dumoulin (Ned) Team Giant-Alpecin 0:50:15
2 Christopher Froome (GBr) Team Sky 0:01:03
3 Nelson Oliveira (Por) Movistar Team 0:01:31
4 Jerome Coppel (Fra) IAM Cycling 0:01:35
5 Rohan Dennis (Aus) BMC Racing Team 0:01:41
6 Bauke Mollema (Ned) Trek-Segafredo 0:01:54
7 Geraint Thomas (GBr) Team Sky 0:02:00
8 Jon Izaguirre (Spa) Movistar Team 0:02:02
9 Tony Martin (Ger) Etixx - Quick-Step 0:02:05
10 Stephen Cummings (GBr) Dimension Data 0:02:24
11 Jan Barta (Cze) Bora-Argon 18 0:02:31
12 Maciej Bodnar (Pol) Tinkoff Team 0:02:32
13 Edvald Boasson Hagen (Nor) Dimension Data 0:02:34
14 Stef Clement (Ned) IAM Cycling 0:02:38
15 Alejandro Valverde (Spa) Movistar Team 0:02:48
16 Tejay Van Garderen (USA) BMC Racing Team 0:02:50
17 Luke Durbridge (Aus) Orica-BikeExchange 0:03:01
18 Adam Yates (GBr) Orica-BikeExchange
19 Ilnur Zakarin (Rus) Team Katusha 0:03:07
20 Nairo Quintana (Col) Movistar Team 0:03:08

Top 20 General Classification after Stage 13

1 Christopher Froome (GBr) Team Sky 58:02:51
2 Bauke Mollema (Ned) Trek-Segafredo 0:01:47
3 Adam Yates (GBr) Orica-BikeExchange 0:02:45
4 Nairo Quintana (Col) Movistar Team 0:02:59
5 Alejandro Valverde (Spa) Movistar Team 0:03:17
6 Tejay Van Garderen (USA) BMC Racing Team 0:03:19
7 Romain Bardet (Fra) AG2R La Mondiale 0:04:04
8 Richie Porte (Aus) BMC Racing Team 0:04:27
9 Daniel Martin (Irl) Etixx - Quick-Step 0:05:03
10 Fabio Aru (Ita) Astana Pro Team 0:05:16
11 Roman Kreuziger (Cze) Tinkoff Team 0:05:24
12 Louis Meintjes (RSA) Lampre - Merida 0:05:48
13 Joaquin Rodriguez (Spa) Team Katusha 0:05:54
14 Sergio Henao (Col) Team Sky 0:06:25
15 Geraint Thomas (GBr) Team Sky 0:06:48
16 Warren Barguil (Fra) Team Giant-Alpecin 0:08:23
17 Sébastien Reichenbach (Swi) FDJ 0:11:41
18 Pierre Rolland (Fra) Cannondale-Drapac 0:12:28
19 Damiano Caruso (Ita) BMC Racing Team 0:15:40
20 Emanuel Buchmann (Ger) Bora-Argon 18 0:19:02