Gunmen abducted Solecki on Feb. 2, after killing his driver as they drove to work in the Southwestern Pakistani city of Quetta. Solecki was in the region to help Afghan refugees.
A U.N. spokesman said officials were aware of the new threat and considers it "serious."
The Pakistan government denies that it operates secret prisons or holds prisoners in secret.
MORE L.A. BREAKING NEWS, WEATHER, TRAFFIC, SPORTS
USEFUL LINKS:
SEND TIP || REPORT TYPO || TWEET @abc7 || WIDGET
