India, Oct. 18 -- A text message found on the phone of US Representative Ilhan Omar's sister reportedly helped investigators secure approval to search the Minnesota Democrat's Washington, DC, home, as federal authorities investigate allegations involving her decades-old immigration records.

According to a New York Times report cited by the New York Post, three people familiar with the matter said investigators obtained Omar's sister Sahra Noor's phone earlier this year and used messages found on it to seek judicial approval for the search.

Federal agents searched Omar's home on October 12, seizing her phone, passport, notebooks and personal computers, according to media reports. The contents of the reported text message have not been ma...