Jordan has declared its border regions with Syria and Iraq to be closed military zones after a suicide bombing on Tuesday that killed six soldiers.
It is not clear who was behind the attack, which was launched from Syrian territory, close to a refugee camp.
The Jordanian government said no new refugee camps would be built and none would be expanded.
Dozens of people have taken part in a candlelit vigil in the capital, Amman, in memory of the victims.
Tuesday’s attack, the first of its kind since the conflict in Syria began in 2011, saw a lorry full of explosives driven at high speed over the border from Syria and blown up beside a Jordanian military post.
Jordan is part of the US-led coalition fighting so-called Islamic State in Syria and Iraq.