France's government on Thursday summoned the Israeli ambassador in Paris in order to seek explanations for the use of a fake French passport by a suspect in the assassination plot. No further details were given about the discussion.
The Foreign Ministry said in a statement that France "expressed its deep concern about the malicious and fraudulent use of these French administrative documents."
Emirates authorities said the alleged killers used fraudulent European passports.
Also on Thursday, Germany demanded that the Israeli embassy in Berlin clarify its involvement in the case, according to a statement issued by the German Ministry of Foreign Affairs.
The Israeli ambassador to the country was asked whether he possessed any information that could explain the circumstances of al-Mabhouh's death.
Germany asked that any such information be handed over to its officials. Meanwhile, Germany's foreign minister said that his country will make every effort to clarify the assassination's circumstances.
Gil Yaron contributed to thestory