Land access to a vital supply port in the Haitian capital of Port-au-Prince is being closed off after attacks by armed gangs, operator Caribbean Port Services (CPS) said on Thursday.

“CPS will shut its barriers to all types of land-based traffic from Sept. 26 to Sept. 29,” it said in a statement, saying that the suspension should allow the army and national police to secure the area.

Ships were being shot at, preventing them from docking and unloading containers, while authorities have reported the kidnapping of two Filipino crew members from a cargo vessel in the port.