BONN, Germany (AP) _ Germany vowed Wednesday to exert the ''greatest possible international pressure'' on Serbia to end the bloodshed in Bosnia-Herzegovina.

The United States and Germany have been considering possible sanctions against Serbia, which the two countries blame for two months of violence and more than 200 deaths in Bosnia.

U.S. Secretary of State James A. Baker III and Foreign Minister Hans- Dietrich Genscher had at least two telephone conversations on the issue during the past week.

Hanns Schumacher, Genscher's spokesman, had harsh words for Serbia.

''The Serb-dominated, so-called (Yugoslav) People's Army has repeatedly tried to realign territorial ownership through the use of force,'' Schumacher said, noting the Serbs and federal army have used similar tactics in Croatia since June.

Schumacher said the European Community has set an April 29 deadline for Serbia to stop the fighting or face international penalties such as ending Belgrade's membership in the Conference on Security and Cooperation in Europe.

''You can assume we are leaving open a whole range of options in the political, diplomatic and economic fields,'' he said.

If the deadline passes with no change in Bosnia, the ''greatest possible international pressure will be put on Serbia'' to end the fighting, Schumacher said.

Also Wednesday, the parliamentary faction of Chancellor Helmut Kohl's governing party demanded an international economic embargo against Serbia.

Genscher has scheduled a series of meetings over the next seven days with EC colleagues to discuss the violence.

On Thursday, Genscher is to meet with Serbian Foreign Minister Vladislav Jovanovic.