The April arrests were announced shortly after a row in which Tehran asked Ankara to withdraw four Turkish diplomats accused of spying , and Turkey expelled four Iranian diplomats for their alleged links to killings of Iranian exiles .
<response> The April arrests were announced shortly after a row in which <location>Tehran</location> asked <location>Ankara</location> to withdraw four <misc>Turkish</misc> diplomats accused of spying , and <location>Turkey</location> expelled four <misc>Iranian</misc> diplomats for their alleged links to killings of <misc>Iranian</misc> exiles . </response>