Romanian police have offered oneway exit permits to several dissidents and police have surrounded their apartments, sources in Bucharest said in phone calls to reporters in Prague and Vienna.

Reports that several dissidents had been arrested could not be confirmed. Writer Paul Goma, who had been reported to be under arrest, told a visiting journalist in Bucharest that police had surrounded his home, but did not take him into custody.

Goma and seven friends signed an open letter last week, accusing Romania and other Soviet-bloc countries of violating human rights.

President Nicolae Ceausescu attacked the dissidents in a speech Thursday, saying there would be "no understanding for those who put themselves in the service of the country's enemies."

Carmen Manoliu, a painter who signed the human rights appeal, told the visiting journalist that her home was blockaded by police. Later, she said, she was summoned to the passport office where she was told that she and her son Sergiu could leave the country.

Two other signers of the appeal, musicians, Emilia and Erwin Gesswein, who have waited two years for permission to emigrate, were told they could leave along with Erwin Gesswein's children, parents and sister.

Goma has said he does not want to leave the country.

The dissidents' open letter had protested imprisonment for political crimes and called for an international conference on defense of human rights.