WASHINGTON (AP) — Federal agents were carrying out "law enforcement activity" on Tuesday at a Washington mansion and New York City townhouse tied to Russian oligarch Oleg Deripaska, a close ally of Russian President Vladimir Putin.

FBI officials would not provide any additional information about the circumstances surrounding their presence at either property or any information about potential investigations involving Deripaska.

A spokesperson for Deripaska told reporters that the searches were "connected to U.S. sanctions" and that the homes didn't belong to him but belonged to relatives.

The...