Singapore will scan travelers' eyes at some of its border checkpoints, local media reported Monday, in a trial of expensive technology that could one day replace fingerprint verification.

It is the latest in a series of high-tech initiatives in the city-state — some of which have stoked privacy concerns among rights advocates — aimed at improving efficiency and security as the threat of militancy in the region has ratcheted up.

Iris-scanning technology, which has been used in other countries such as the United States and the United Kingdom with varying degrees of success, can cost five times more than existing fingerprint systems, according to experts.