Pakistan, July 20 -- A glitch in Malaysia's self-service border control machines has hit tens of thousands of travellers, the immigration department estimated Saturday, causing delays at the capital's airport and land crossings.

Among major gateways affected since Friday afternoon are Kuala Lumpur International Airport's two main terminals, as well as southern land crossings with Singapore.

"It should be more than tens of thousands of travellers who have to wait longer at the manual counters to clear immigration," estimated Zakaria Shaaban, director-general of Malaysia's Immigration Department.

Zakaria was unable to give a precise number of people affected when asked by AFP.

"We don't have many manual counters over in Johor because we...