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Bangkok, Thailand (CNN) -- Authorities have stepped up security measures in a volatile region of western Myanmar amid a fresh outbreak of sectarian violence between Buddhists and Muslims.

Clashes in recent days between the two communities in Rakhine State have killed seven people, wounded dozens of others and resulted in more than 1,000 houses being set on fire, Myo Than, manager of the state government's information department, said Thursday.

In an effort to clamp down on the unrest, authorities are sending extra security forces to the affected areas. Overnight curfews, in effect since a severe outbreak of communal violence during May and June, have been lengthened in several townships, Myo Than said.

Rakhine is home to the Rohingya, a stateless Muslim minority who say they have been persecuted by the Myanmar military during its decades of authoritarian rule. The country does not recognize them as citizens.

The clashes between the majority Buddhists and the Rohingya minority during the summer killed at least 88 people -- mostly Rohingya -- according to state-run media.

The violence in May erupted after police detained three Muslim men on accusations they raped and killed a Buddhist woman. Clashes spread, prompting the government to deploy the military to restore order.

Hundreds of Rohingyas tried to cross the border into neighboring Bangladesh, but were turned back.

Bangladesh said it already had too many Rohingya refugees, estimating that about 300,000 live in the country.

Even after the killing stopped, simmering tensions remained in Rakhine, as shown by the resumption of violence this week.

Those who lost their homes have had to live in refugee camps. About 75,000 people were displaced, according to the U.N. Office for the Coordination of Humanitarian Affairs in Myanmar.

Myo Than said the government is aiming to return the situation to normal by organizing negotiations between the two sides and increasing security.

State officials say they have sent medical teams accompanied by military personnel to two of the remote townships hit by unrest to offer treatment to Rohingya people too scared to go to a hospital.

Journalist Phyu Phyu Zin in Yangon, Myanmar, contributed to this report.