Annapolis' Greek community mourned today the loss of three members of one of its families, killed in an explosion apparently caused by a bomb on a TWA jetliner taking them to their family home in Greece.

Demetra Stylianopoulos, 52, her daughter, Maria Klug, 24, and her 8-month-old granddaughter, Demetra Klug, lived together on Hilltop Lane here with Maria's husband Warren. They had left Annapolis Tuesday to return to Piraeus, where Stylianopoulos (who often used the last name Stylian) was born, to sort out property owned by her husband, who died here last November.

The family moved in 1971 from Greece to Annapolis, where Stylianopoulos' brother Paul Alexiou already lived, and they were employed in the contracting business, as is Maria Klug's husband. Demetra Stylianopoulos also worked part time as a cashier in Timmy's Carry-Out on Maryland Avenue, which her brother and nephew own.

Friends said the family was told of the deaths around noon by the U.S. Embassy in Greece, and Warren Klug and Stylianopoulos' only other child, Kathy, left for Greece later in the day to identify the bodies.

Other family members and friends gathered at Alexiou's house in Annapolis to share their grief. Alexiou's son Tim said the family returned frequently to Piraeus. There was "shock and sorrow," he said. "Shock, obviously: You just don't fully accept it."

The family had American citizenship and took great pride in the fact, friends said. Andre Pantelides, a board member at the St. Constantine and St. Helen Greek Orthodox Church, a center for the Greek community in Annapolis, said the family was active in church affairs. Stylianopoulos was regularly seen at church bazaars cooking pastries to make money for the church building fund.

Pantelides said church members are devastated by the news. "The church is the central meeting place" for Greeks in Annapolis, Pantelides said. "We are all more or less related to one another through being baptized -- we baptize each other's children. So we spread into each other's families."

Pantelides said he believed that Stylianopoulos and her daughter and granddaughter planned to be in Piraeus to celebrate Easter, which this year falls on May 4 on the Greek Orthodox calendar.

"This is crazy that this can happen," Pantelides said. " . . . I don't care who did it -- that's not the point. But something has to happen. This is the United States of America. We're a powerful country.

"Where is it going to happen next? How much closer can it get?" he asked. "Are we going to be afraid to visit our people? Are we going to be afraid to go to our motherland?"