Human Rights Watch recently listed a series of arrests and police harassment of web dissidents since mid-April. The organization alleges the Vietnamese government masterminded a series of malware and distributed denial-of-service attacks on alternative political websites over the past year.

HRW said police beat one Internet dissident while interrogating her April 28. Another blogger discovered his Internet and phone lines were cut off May 8, following a written order from authorities in his hometown, accusing him of spreading “anti-government” information.

In April, McAfee and Google said they had traced a series of cyber attacks on Vietnamese-language political websites to IP addresses inside Vietnam. HRW said two foreign Vietnamese-language websites hit by hundreds of DDoS attacks had traced them to an IP address belonging to a government-owned telecommunications company under the Ministry of Defence.

The Vietnamese government has yet to respond to HRW’s accusations.