Police in the Czech Republic say they have discovered a total of 12 illegal weapons at the Palestinian embassy complex where a possible booby-trapped safe killed the ambassador.
Spokeswoman Andrea Zoulova declined to provide more details on Sunday, citing an ongoing investigation.
Ambassador Jamal al-Jamal, 56, died on Wednesday after an embassy safe exploded in Prague.
The career diplomat had only started his posting in October.
It remains unclear why there were unregistered weapons at the embassy and what caused the safe to explode.
The death is being investigated as a case of negligence.
Residents in the Suchdol district, where the new embassy complex is based, have lodged security concerns over the incident.