Taipei, Dec. 21 -- Hours after a deadly stabbing spree at a bustling Taipei metro station that killed at least three people, police said the attack was planned, as the suspect had visited the site multiple times before carrying it out, NHK reported.

Police confirmed that the suspect had been surveying the area in the days leading up to the attack. According to NHK, he visited the crime scene three days before the incident and also went to a commercial facility in the area on Thursday or Friday.

The 27-year-old suspect, who later died after jumping from the sixth floor of a building following the attack, was already on a wanted list for obstructing military service procedures by failing to respond to a draft notice.

The attack occurred ...