Niall Horan is speaking out following the death of his former One Direction bandmate, Liam Payne, who died in Buenos Aries, Argentina, on Wednesday. He was 31.

A fan of Liam Payne exclusively tells PEOPLE that she had a few interactions with him leading up to the One Direction member's death, and there was "nothing strange or unusual" about his behavior.

Niall Horan was spotted for the first time after the tragic death of his former One Direction bandmate Liam Payne. The “Heaven” singer was photographed while out on a leisurely stroll with his girlfriend Amelia Woolley and his dog in London on Thursday.