<h2>Introduction</h2>
Authorities executed search warrants at the homes of Indiana University Professor Xiaofeng Wang and his wife Nianli Ma, but did not confirm their arrests or immigration status.

<h2>Context</h2>
<ul>
 <li>Xiaofeng Wang's online profile has been removed from the university's website.</li>
 <li>He has been placed on administrative leave according to colleagues.</li>
</ul>

<h2>Developments</h2>
<ul>
 <li>There is no record of any federal criminal case against either Wang or Ma based on available information.</li>
 <li>Indiana University announced that inquiries regarding their employment status should be directed to the FBI.</li>
 <li>Confirmation of the execution of the search warrants has been provided by the university.</li>
</ul>

<h2>Conclusion</h2>
The situation regarding Xiaofeng Wang and Nianli Ma remains uncertain, with further updates likely to follow as authorities continue their investigations.