Iran has long been a malign actor in the region - U.S. Department of  State 

ArmInfo. Iran has long been a malign actor in the region. It's engaged in malign activities, activities that threaten its neighbors both near and far, U.S. Department Spokesperson Ned Price told a briefing on March 13 as he commented on an Iranian fighter jet's flight along the  Iranian-Azerbaijani border. 

"So we watch these types of tensions with concern. Our approach has  been to invest in our engagement with Azerbaijan, with Armenia in the  South Caucasus to, as we were saying in a very different context a  moment ago, to create a South Caucasus region that is more stable,  that is less prone to conflict, that is less prone to tension," he  said in response to a question about an increasing tension between  Azerbaijan and Iran. 

In commenting on Belarusian President Lukashenka's visit to Iran, Mr  Price said: 

"We see this as, in some ways, an extension of the deepening  relationship between Iran and Russia. We've been - had no shortage  over the past year of sharing our concern of the deepening  relationship between Iran and Russia. We've talked about it in terms  of the security assistance that those - that Iran is providing  Russia, and vice versa, and we've also made the point that, in what  Lukashenka has offered to Russia, he has essentially ceded his  sovereignty to the Kremlin, to Russia. And so now, with Lukashenka in  Iran, in some ways you can see that as an extension of the deepening  partnership between Iran and Russia. But it's something we're  watching very closely. These are two birds of a feather, and  oftentimes they do flock together." 

In response to a question about Russia sending apparently captured  U.S. weapons to Iran, Mr Price said:

"When it comes to.the weapons that have reportedly been captured,  I've seen those reports. I'm not in a position to confirm those  reports. As you know, we have a robust monitoring plan in place that  takes a look at any potential instances of diversion. We are still  where we have been for - since the start of this conflict.  We have  not seen any credible indications that security assistance that we  have provided to our Ukrainian partners have been diverted to any  other actor, but we're watching this very closely."