PARIS - A high-speed TGV train accident in eastern France at the weekend that left 11 people dead was the result of "late braking", rail company SNCF said on Thursday.

The spectacular accident saw the next-generation train strike a bridge before jumping the track and breaking in two, landing partially in a canal. The train, which was on a test run, began braking a kilometre (just over half a mile) too late as it approached a stretch of older track, SNCF said.

There were seven people in the driver's wagon, instead of the authorised four. The crash in the town of Eckwersheim, 20 kilometres (12 miles) north of Strasbourg, was the first fatal accident for France's flagship train service since it went into service in 1981.

The company said it would launch disciplinary proceedings against those responsible, and would investigate why there were children on board a test run. There were a total of 53 passengers on the doomed train of whom 42 were injured including children aged between 10 and 15, prosecutors said earlier this week.

The head of the state-owned SNCF, Guillaume Pepy, said such an accident "obviously" would not have taken place during a passenger journey when automatic safety mechanisms would have been triggered. Officially, 49 technicians and railwaymen were assigned to test the new TGV, which was due to go into service next spring.

"This is a president who was ridiculed with this nickname 'marshmallow' for being undecided, indecisive, who seems to now be fully at ease in his new clothes of chief of the army." Hollande has urged a global fightback against IS which claimed the attack, making moves towards a military rapprochement with international pariah Russia in Syria. In the days after the attacks by three teams of gunmen and suicide bombers, Hollande and his government also pushed for more border controls.

, thousands more jobs in the security forces and possible house arrest for French citizens returning from Syria.

Under a state of emergency, which lawmakers voted on Thursday to extend for three months, police will be allowed to carry weapons when not on duty and Hollande also wants to change the constitution to make it easier for the government to make decisions in a time of crisis.

At a joint session of parliament on Monday, Hollande suggested stripping citizenship from convicted jihadists born in France who hold a second passport, dumbfounding the political right which saw its proposition to do so rejected by parliament in April.

Both the right and far-right praised the new measures, with a lawmaker for former president Nicolas Sarkozy's The Republicans (LR) party accusing him of "going shopping among our propositions." But while on Monday both houses of parliament stood to sing a moving rendition of the "Marseillaise" anthem, the show of national unity quickly showed strain.

A day later Prime Minister Manuel Valls was booed in a rowdy session in the National Assembly as he asked "patriots to come together to combat terrorism." "It's too late," shouted a lawmaker with Sarkozy's party from the benches.

The government has been forced to defend itself against security failings as it emerged that known jihadists had launched a massive and sophisticated operation under the noses of intelligence agents.

"How many victims must there be before we use the word (failings)? Were all the implications considered after the January attacks? The answer is no," Sarkozy told Le Monde newspaper. "Too much time was wasted," said Sarkozy, who is hoping to take another run at the presidency in 2017 polls.

"Nor did the government draw all the right conclusions about the impact of our military intervention in Syria on internal security," he said. Marine Le Pen of the far-right National Front (FN) has said Hollande's measures were "picked from the saddlebag of the FN." She said Hollande's government "should have resigned" after the attacks.

The analyst Marliere said that after the "facade" of national unity, parties were "trying to score political points", which was harder in January when Hollande -- the most unpopular president in French history -- saw his star rise in the polls. Friday's attacks came just weeks before key regional elections, in which Hollande's Socialists had already been expected to face defeat against the Republicans, with Le Pen's far-right likely to reap more gains.

Marliere warned of the danger of Hollande's hardline response to the attacks at a time when traumatised citizens are likely to approve of any such measures, and any disapproving leftists are too weak to make their voices heard.