Taipei  - A Taiwanese man was arrested in the robbery of 5,000 Taiwan dollars (143 US dollars) from a computer engineer after leaving his phone number with his victim to demand more money later, local television reports said Wednesday.

The engineer was collecting money at a cash machine in the central county of Taichung Tuesday night when the man threatened him with a knife and robbed him, the cable news network ETTV said.

The robber demanded more money from the engineer, who told him he could borrow 20,000 Taiwan dollars from his friends. The robber then left his phone number with the engineer, who later gave it to police, ETTV said. (dpa)