Authorities: Gunpoint robbery suspects on the loose across the Bronx

Police are asking for help finding two men linked to a robbery pattern across the Bronx.
Investigators say the first incident happened on Dec. 3 in front of 1687 Croes Place when a man met up with another to sell his chain after connecting on social media. The suspect put a gun to the back of the victim's head and took his wallet, bank card and car key.
The second incident took place on Dec. 9 near Elis and Havemeyer avenues. A man was approached by two strangers who showed a gun and took the gold chain from his neck before getting away in a white Mercedes-Benz.
Anyone with information on the incidents is asked to call police.