Dhaka, Oct. 21 -- A cargo plane veered off a runway Monday during landing in Hong Kong, hit a security patrol car and then skidded into the sea, leaving two men in the vehicle dead, authorities said.

Officials said an investigation would aim to determine what caused the Boeing aircraft to leave the tarmac at Hong Kong International Airport, the world's busiest for cargo last year, according to an industry ranking.

The plane's damaged fuselage was left partly submerged in the seawater that borders the airport, with its emergency evacuation slides extended, following one of the most serious incidents since the airport began operations in 1998.

Steven Yiu, executive director of airport operations at Airport Authority Hong Kong, said the car...