A stadium formerly under the control of gangs in Haiti was cleared with the assistance of robot dogs armed with rifles, deployed by the Salvadoran military, according to El Salvador’s President Nayib Bukele.

Bukele shared a video on social media showing clips shot as combined forces, including the Haitian National Police, the Haitian Armed Forces (FAd’H), the Task Force, and the Salvadoran Special Forces, successfully took control of Sylvio Cator Stadium.

The footage showed four-legged headless robots, with guns mounted upside down on their backs, being used in the operation, which was carried out under the bilateral agreement between the Haitian government and the government of El Salvador.

Bukele noted human skulls were discovered during the operation, adding that the teams will now establish an operational base at the stadium to facilitate deeper advancement into territory controlled by gangs.

The president also shared that armed forces now have the upper hand on the ground and demanded that all gang members leave the area before the offensive begins.

Bukele added that those who choose to stay and fight will have to face the consequences.

The offensive comes just weeks after Bukele deployed a hundred troops into Haiti following the kidnapping of several Salvadorans who were in the country.

READ: El Salvador troops arrive in Haiti to search for missing colleagues

The president said the missing team, kidnapped during a supermarket outing, were not combatants but personnel trained for medical evacuations and added that the forces would increase if they are not returned.

“Nothing compared to what awaits you if you do not release the four hostages, safe and sound…And do not mistake our words for empty threats. We have dealt with gangs in El Salvador before, and we are fully capable of doing the same with you. There is still time to avoid this. Return our four compatriots to us, safe and sound, and everything will go back to the way it was before the abduction. The decision is in your hands,” Bukele had said.

At least 2,000 Salvadoran soldiers have since been deployed to Haiti and the UN announced on November 3 that a Haitian gang leader wanted by the United States has asked the UN to mediate.

(Video: Nayib Bukele)