Selangor Criminal Investigation Department head SAC Fadzil Ahmat said the victim, who was in his 30s and did not possess any personal documents, was holding on to an Astro dish at the balcony of an apartment unit when police raided the premises, but the dish snapped, causing the man to fall.

The man injured his nose and broke his right arm from the fall and was sent to Sungai Buloh Hospital for treatment, and is reported to be in stable condition, he said.

Fadzil said a total of 171 foreigners were rounded-up during the operation at Flora Damansara, with 51 of them detained for various offences under the Immigration Act.

Those detained were required to undergo urine test for drugs and so far 10 of them tested positive, he said, adding that all of them did not have a permanent job and some of them claimed to be studying in the country.

The five-hour operation, which ended about 12.30am today also involved the Immigration Department and Petaling Jaya City Council.