YEREVAN, OCTOBER 26, ARMENPRESS. Fires have razed parts of the "Jungle" migrant camp in Calais, as French authorities continue operations to demolish it, reports BBC.

At least one gas canister exploded, with one migrant lightly injured.

The clearance began on Monday and about 4,000 migrants - out of some 7,000 - have been taken from the squalid camp to shelters around France.

There remain concerns that some will refuse to give up their attempts to cross the Channel to get to the UK.

The operation has been largely peaceful so far.

The BBC correspondent, at the camp, says huts were set on fire overnight on the main street leading into the camp, leaving them in ashes.

He says this may have been a last act of defiance from migrants who did not want to leave and did not want to see their shelters taken down by the authorities.

The prefect of Pas-de-Calais, Fabienne Buccio, told BFMTV is was "a tradition among the migrant population to destroy their homes before leaving".

However, the Calais police commissioner said he had been told by migrants that the fires were started by activists.

Camp resident Mahmoud al-Saleh told Agence France-Presse: "There were several fires overnight. Every time one was put out, another would erupt. It was clearly intentional.

"The firefighters came late. For a long time it was just us, migrants and volunteers, fighting the fires."

More smoke was seen rising from the camp on Wednesday morning.

More migrants joined queues on Wednesday for buses to take them out of the camp, with the situation calmer than the jostling of the previous morning.

Crews had begun dismantling the Jungle with sledgehammers on Tuesday. Workers in hard hats and orange jumpsuits pulled down unoccupied tents and shacks.

The work has been carried out mostly by hand, and in a low-key manner, as officials believe sending in bulldozers at this point would send the wrong message to migrants.

The demolition is expected to continue on Wednesday, and is planned to be completed by Friday. Calais police say only about 200 people are expected to be in the camp by then.

About 3,000 migrants have been moved out on coaches to centres across France, while another 1,000 unaccompanied minors have been given accommodation in containers near the Jungle.

BBC correspondent says the figures are hard to get a grip of. Some 4,000 migrants are accounted for, he says, but the camp had an estimated 6,000-8,000 residents and it is possible a large number have disappeared - either to squat or sleep rough around Calais or go to other towns of their own accord.

The fear is they will return to set up camp again once the clearance is over.

The charity Save the Children has voiced concern for what it says are hundreds of minors who have been unable to register for the shelters and have nowhere safe to stay during the demolition.

Almost 200 children from the camp have been brought to the UK, some of them under the "Dubs" amendment to the Immigration Act, according to UK Home Secretary Amber Rudd.

The amendment allows particularly vulnerable children - such as girls and those under 13 - refuge in the UK, even if they do not have family already in the country.

More than 1,200 police officers have been deployed for the clearance operation in Calais.

The French interior ministry said officers "might be forced to intervene" if there was unrest during the demolition.