Iran has the right to retaliate expulsion of its diplomat from Bahrain, Iranian Foreign Ministry Spokesman Ramin Mehmanparast said, ISNA reported.
"The right for the Islamic Republic of Iran in retaliation is kept based on international diplomatic rules," Mehmanparast said on Tuesday.
His remarks came after Bahrain has ordered the expulsion of an Iranian diplomat for alleged links to a spy ring in Kuwait.
"The measure of Bahrain's Foreign Ministry aims at putting the blame on other countries and ignoring the realities," Mehmanparast said.
"The measure goes against good neighboring and stabilizing regional security," he contined.
Iran has already condemned deployment of foreign troops from Saudi Arabia and the United Arab Emirates in Bahrain in March to help crush pro-democracy protests.
A statement on the Bahrain News Agency late on Monday said Bahrain's Foreign Ministry had summoned charge d'affaires Mehdi Islami to inform him diplomat Hojjatullah Rahmani had 72 hours to leave "based on his link to the spy cell in Kuwait."
This month Kuwait expelled three Iranian diplomats for involvement in an alleged spy ring.
Tehran ordered three Kuwaiti diplomats to leave Iran.