British Prime Minister David Cameron and French President Francois Hollande.

British Prime Minister David Cameron and French President Francois Hollande laid a wreath at the Bataclan concert hall in Paris on Monday where 90 people were killed by militant attackers.

Cameron said on his Twitter account he had stood “shoulder to shoulder” with Hollande at the venue, where a British man was among the dead on November 13.

The two leaders went on to have talks at the Elysee Palace at which Hollande was expected to tell Cameron of his plans for an international coalition to crush ISIS after the militant group claimed responsibility for the Paris carnage.

Hollande said that Paris and London must work together to end the threat posed by ISIS, after talks with Cameron.

“We have joint obligations,” Hollande told reporters as he kicked off a week of intense diplomatic efforts aimed at rallying support for a renewed bid to crush ISIS.

Cameron said he believed Britain should strike ISIS targets in Syria.

“I firmly support the action President Hollande has taken to strike ISIL in Syria,” Cameron said after talks in Paris, adding: “It’s my firm conviction that Britain should do so too.”

Cameron is believed to be pushing to secure parliamentary support for a possible motion to launch British air strikes on ISIS targets in Syria.

In an article in the Daily Telegraph on Monday, he wrote that the Paris attacks showed that IS “is not some remote problem thousands of miles away; it is a direct threat to our security”.

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