Sri Lankan police say they have arrested nearly 14.000 people during a week-long crackdown on drug traffickers across the country.
They say that the operation led to the seizure of almost 440 kilograms of various types of narcotics, including heroin.
Local media footage shows police officers with sniffer dogs searching homes in Colombo and elsewhere.
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Human rights activists said the raids were illegal because they were carried out without a search warrant.
A police spokesman told the BBC that warrants are not always needed for such actions when looking for drugs.
Officials say a total of 13.666 suspects were arrested during the operation, and 1.097 addicts were sent to a military rehabilitation center.
The vehicles and property of the alleged criminals were also confiscated.
Activists said the raids targeted poor neighborhoods.
According to experts, traffickers use Sri Lanka as a hub, and the drugs that pass through the country - heroin, hashish and cannabis - create serious problems.
Officials say raids have been paused for Christmas but will resume next week.
In December 2016, the police seized 800 kilograms of cocaine, which was the largest seizure in Sri Lanka.
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