Kenyan lawyers have moved to block the country's planned deployment of police to Haiti, a court filing showed, days before officers are expected to arrive in the Caribbean nation to tackle spiralling violence there.

Responding to Haiti's appeal for assistance, Kenya offered last July to send 1,000 officers to Haiti to help tackle a worsening security crisis where escalating gang control has plunged millions into a humanitarian crisis.

However, Kenya's High Court ruled in January that the police officers could not be deployed to Haiti in the absence of a "reciprocal arrangement" with the host government.

Kenyan President William Ruto then signed a security deal with Haiti's then-prime minister Ariel Henry in March which Nairobi hoped would satisfy the court's objections and allow the deployment to go ahead.

"The applicants are reliably informed that the impugned deployment may be done any time from now," the plaintiffs said in Thursday's application, adding that a May 23 deadline for the step made the matter urgent.

In March, the government said it was pausing the deployment after the resignation of Haitian Prime Minister Ariel Henry.

But Ruto said later that the swearing-in of a transition council in Haiti on April 25 had addressed concerns about a power vacuum there and that Kenya was now discussing how to proceed with its deployment.

Last week, the U.S. military's Southern Command said civilian contractors had arrived in Haiti to build living quarters for the Kenyan-led force.

Jamaica, the Bahamas, Barbados, Benin, Chad and Bangladesh have also pledged personnel to the force.

Foreign governments have been reluctant to take part in the mission. Many Haitians have also been wary of international interventions after previous UN missions left behind a devastating cholera epidemic and sex abuse scandals.