Three persons have been detained on suspicion of violating immigration laws following the deaths of five migrants, one of whom was a child, while attempting to cross the Channel.

According to the National Crime Agency, detectives are interviewing two Sudanese men, ages 19 and 22, as well as a third suspect, age 22, who is from south Sudan, in connection with the tragedy.

They were detained on suspicion of encouraging unauthorised immigration and breaking the law by entering the UK.

Interviews with the 55 boat passengers who survived have already taken place, and more are anticipated in the days ahead.

Craig Turner, deputy director of investigations for the National Crime Agency, said: “This tragic incident once again demonstrates the threat to life posed by these crossings and brings into focus why it is so important to target the criminal gangs involved in organising them.

“We will do all we can with partners in the UK and France to secure evidence, identify those responsible for this event, and bring them to justice.”

More than 400 migrants arrived in the UK on the day the group died.

The crossings took place as the tragedy off the coast of northern France unfolded, just hours after Parliament passed legislation aimed at getting the Government’s plan to give asylum seekers a one-way ticket to Rwanda off the ground.

A dinghy carrying more than 100 people set off from Wimereux at around 6am on Tuesday but got into difficulty.

Three men, a woman and a girl died, according to the French coastguard.

Some 49 people were rescued but 58 others refused to leave the boat and continued their journey towards the UK, the coastguard said in a statement, with several other boats later embarking on the crossing.

Home Office figures show 402 people made the journey in seven boats that same day after an eight-day break in activity in the Channel, which suggests there was an average of around 57 people per boat.

Young children and babies were among those seen being taken ashore in Dover, Kent, while witnesses saw crews carrying someone on a stretcher from a lifeboat to an ambulance.

The latest crossings take the provisional total for the year so far to 6,667 – 20% higher than this time last year (5,546) but slightly lower (down 0.4%) than the figure recorded at this stage in 2022 (6,691).

Some 29,437 people made the journey in 2023, down 36% on a record 45,774 arrivals in 2022.

Campaigners said the Rwanda plan will not save lives as they lamented the news of more deaths due to the treacherous journey and called for the Channel not to become a graveyard for children.

But Prime Minister Rishi Sunak said the incident underscores the need for the deterrent the Government hopes sending migrants to the east African nation if they arrive illegally in the UK will bring.

The National Crime Agency said it will be supporting the French investigation into the deaths with UK police and Border Force.