Advocates for Myanmar's Muslim ethnic Rohingya community said Wednesday that more than 100 members of the minority group have been killed in recent government counterinsurgency sweeps in the western state of Rakhine.

Ko Ko Linn of the Arakan Rohingya National Organization said that according to villagers, at least 150 people had been killed by security forces since Saturday. Independent verification of both army and activists' claims is difficult because the government has restricted access to the area.

"The reason why the international news agencies and aid groups are not allowed to go there is because the military is trying to cover up what they are doing there, the killings and other things," Ko Ko Linn said by phone. "They are lying."

The government on Tuesday acknowledged the deaths of 69 "violent attackers" and 17 members of the security forces. The attackers weren't specifically identified, but the army has aligned with Rakhine Buddhists against the Rohingya. The government says the attackers burned down hundreds of homes, but rights groups blame the army for such actions and other abuses of Rohingya civilians.

Tensions have been high in Rakhine since fighting in 2012 between Buddhists and Rohingya Muslims. More than 100,000 Rohingya are still in squalid camps for the internally displaced after being driven from their homes at that time. Although many have lived in Myanmar for generations, they are widely regarded as illegal immigrants from Bangladesh, and the government denies citizenship to most of the million or so Rohingya.

Government military operations intensified last month after nine police officers were killed in attacks on posts along the border with Bangladesh. International concern has been building slowly since then.