Danish police Thursday evacuated three apartment buildings in north-western Copenhagen after a report of suspicious chemicals being stored in the cellar, DPA reported. But the alert was called off after three hours and the cordons were lifted, with police saying the incident had been a "youthful prank." Preliminary investigation suggested that the containers contained sludge water and some basic liquid. Power to the neighbourhood was cut and bomb experts were deployed after a report that two teenagers had been seen a few weeks ago in a stairwell with a bottle of liquid. The bottle later exploded in a stairwell. A second bottle was found, and a deputy landlord put it in the cellar and remembered that, causing the alert. Tension has remained high since Tuesday when raided 11 locations and arrested eight men on suspicion of bomb-making. Two of the eight were later remanded in custody for 27 days.
