The Commission said Kotromanovic had been in conflict of interest because the flight was paid by a foreign entity, namely Russian capital which could have brought him in a dependant position towards that company.
"It's hard for me to say at this point if it is necessary to send troops to the border. Some countries have done so, and whether or not Croatia will need to do the same will depend on a security assessment," Reiner said in response to questions from the press.
President Kolinda Grabar-Kitarovic said on Wednesday that by taking action against her for violating "the principles of discharge of public office and credibility of the President of the Republic" and not for a conflict of interest, the Conflict of Interest Commission had overstepped its powers and entered the sphere of political arbitration.
Outgoing Croatian Defence Minister Ante Kotromanovic has said Croatia does not have negative comments on Serbia's announcements of possible procurement of Russian long range surface-to-air missile systems S-300.
"Let them do it, but when you decide to procure ballistic missiles with a 300 kilometre range, this is not something you do for peace in the region. Who is building peace with Ballistic missiles?" Stefanovic wondered.
"I remind you that Croatia is a member of the European Union and NATO which both advocate permanent peace. Our duty is to lead our country and equip our army the best we can, same as you," Kotromanovic said.