Four people have been treated for gunshot wounds in Burkina Faso after French forces tried to deter protesters trying to block a French army convoy.

The French military convoy is crossing through Burkina Faso on its way from Ivory Coast to Niger.
The French military convoy is crossing through Burkina Faso on its way from Ivory Coast to Niger. (AP)

Four protesters have been injured by French soldiers in the town of Kaya in Burkina Faso during the third day of a civilian blockade against a French military convoy en route to Niger. 

Anger is rising in the former French colony over the inability of Burkinabe and international forces to prevent rising violence by militants. State security forces suffered their heaviest loss in years on Sunday when gunmen killed 49 military police officers and four civilians.

A medical source said that "the emergency department at the Kaya hospital received four people with gunshot wounds".

Hundreds of people massed on the road to block the French armoured vehicles' path in the city of Kaya, according to a Reuters reporter there.

One held a handwritten sign that read: "Kaya says to the French army to go home".

The French vehicles eventually pulled off the road into an area protected by metal fencing, where they remained at the end of the afternoon.

Some of the protesters voiced conspiracy theories common in Burkina Faso and neighbouring countries, alleging that the French work with the militants.

"We asked them to open their vehicles so that we have an idea of the contents," one protester, Bassirou Ouedraogo, told Reuters.

READ MORE: Armed group kills several policemen in northern Burkina Faso

Similar protests 

The convoy encountered similar protests in other towns, but had been able to continue until Kaya, witnesses said.

A source at the French embassy in the capital Ouagadougou and a French army source confirmed the situation in Kaya but did not give further details.

France intervened in neighbouring Mali in 2013 to beat back an Islamist insurgency that had seized the country's desert north and has since kept thousands of troops in the region.

But militants linked to al Qaeda and Islamic State have been able to strengthen their foothold and expand into countries such as Burkina Faso and Niger.

France is currently in the process of roughly halving its previous troop strength in the Sahel to about 2,500-3,000 soldiers as it looks to transfer more responsibility to local armies and a multinational European taskforce.

READ MORE: Burkina Faso in mourning as militant attack death toll climbs

Source: TRTWorld and agencies