
Passengers have been removed from two ferries docked at Picton as specialist police staff search the vessels.
"Police are investigating and as a precaution, specialist search group staff will be searching both the Interislander and Bluebridge ferries currently berthed in Picton," Inspector Simon Feltham said.
All passengers have disembarked from the Cook Strait ferries.

"Police continue to liaise closely with both the Interislander and Bluebridge as we work to resolve this matter."
Interislander executive general manager Walter Rushbrook said its services were "currently being disrupted" as the result of police responding to an incident at Picton.
"We are awaiting direction from the police to resolve the situation as quickly as possible, and any further information should come from them."