WASHINGTON (AP) _ The State Department advises U.S. citizens not to travel to Liberia because of its political instability and to consider carefully whether to travel to Indonesia because of political demonstrations there.

The advisory issued Wednesday pointed to frequent demonstrations and civil unrest, sometimes resulting in violence, in various parts of Indonesia.

It cautioned U.S. citizens already there ``to exercise prudence and common sense,'' avoiding situations that could turn violent.

In Liberia, the department cited ill-trained and armed government security personnel as a potential danger. It noted continuing rebel activity along the Sierra Leone-Liberia border and discouraged travel anywhere in Liberia after dark.

The department also announced an outbreak of Japanese encephalitis in Malaysia that principally affects people who have come into contact with pigs or live near big farms.