US envoy will meet Russian Presidential Special Representative Zamir Kabulov, Chinese Special Envoy Deng Xijun and EU Special Envoy Roland Kobia at the Department of State.
The announcement follows the terror attack on two mosques in the southern city of Christchurch that left at least 50 persons dead and another 50 injured.
The National Intelligence Organization (the state intelligence agency) is investigating if Monday's shooting was personally motivated or was an act of terrorism.
At age 8, children in Singapore are the youngest in the world to get an internet-connected device but parents and teachers concerned about their online safety.
Pompeo said on last Friday that Washington is still hopeful for continued talks with Pyongyang, confirming there is ongoing negotiation between the two sides.
The shock of the attacks has led to calls for an immediate tightening of laws to restrict access to some firearms, particularly semi-automatic weapons.