ATHENS, Greece (CNN) -- Greece was bracing for more riots Monday as students angry over the police killing of a 15-year-old boy in Athens threatened to take demonstrations that have left the country in turmoil into a second week.
Riot police avoid being hit by a Molotov cocktail thrown by protesters in Athens on Saturday.
Protesters were reportedly hurling eggs at police outside the main court building in Athens while a sit-in is scheduled to take place in front of the national police headquarters.
Although Sunday was relatively quiet, the student have threatened daily protests this week, calling for roads to be blocked on Tuesday, a demonstration Wednesday outside the courthouse where the police involved in the shooting will be testifying, and a nationwide protest on Thursday.
The unrest is threatening the government's hold on power, with some opposition groups calling for fresh elections. Stores and international businesses have been attacked, and at least 280 people have been detained by police. Of that total, 176 were arrested, 130 of them over looting.
There was a rash of demonstrations Saturday, the one-week anniversary of the death of Alexis Grigoropolous, including attacks on a police station in the Athens district of Exarchaia and on the environment ministry building by angry protesters with stones and Molotov cocktails.
The main demonstration Saturday was a peaceful candlelit vigil in front of Parliament on Syntagma Square in the capital.
Several thousand people turned out for the demonstration, many of them students but including people of all ages and from all walks of life. Demonstrators held a similar sit-in in the northern city of Thessaloniki.
Some stayed for an all-night sit-in.
There was relative calms in the streets and across the country as Sunday dawned.
The two officers involved in the December 6 shooting were remanded into custody Wednesday pending trial. One is charged with premeditated manslaughter and the other with acting as an accomplice.
Journalist Anthee Carassava contributed to this report.