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.
Friday's attack, which Ardern labelled as terrorism, was the worst ever peacetime mass killing in New Zealand and the country had raised its security threat level to the highest.