Bangladesh police have killed at least 86 people and arrested about 7,000 since launching a crackdown on drug trafficking this month, officials said on Monday, raising fears from rights activists of a Philippines-style war on drugs.

Prime Minister Sheikh Hasina approved the anti-narcotics campaign in early May to tackle the spread of ya ba, as methamphetamine is widely known in Asia, and worth an estimated $3 billion annually, government officials say.

The drug is sourced from Myanmar's northeast and smuggled into neighboring Bangladesh.