Video of the action: https://www.instagram.com/reel/DOVXFTLCPFo/

Local news report translated with deepl:

There has been further unrest at and around the Elbit branch in Ulm: According to the police, several individuals broke into the building in the Böfingen district early on Monday morning. At around 3:30 a.m., security personnel reported several individuals on Eberhard-Finckh-Straße in Ulm.
They threw paint bombs at the entrance area and set off smoke bombs. In addition, the suspects sprayed graffiti with “presumed political content” on the parking lot, according to a press release from the Ulm police and the Baden-Württemberg State Criminal Police Office. Some of the activists are even said to have broken into the building. To do so, they smashed several windows on the building.
The police did not officially confirm either the name of the company or the fact that the troublemakers were activists. However, several sources at our editorial office confirm this. The police first surrounded the company building and were able to arrest several people on an upper floor without resistance shortly thereafter. The State Security and Anti-Terrorism Center of the Baden-Württemberg State Criminal Police Office has taken over further investigations. Protests against the company repeatedly take place in front of its building and in Ulm city center. Pro-Palestinian demonstrators accuse the company of deliberately producing “lethal drones” for use in the Gaza Strip. Criticism of the state of Israel also regularly features in these demonstrations. In the past, demonstrators have often called on the Ulm city administration to close the Elbit branch in Ulm. However, according to its own statements, Elbit in Ulm primarily manufactures modern radio communication systems, night vision devices, drones, and cyber and command systems—including for the German Armed Forces.