A group called “Yemeni Hackers” said they were behind the latest attack.

Some of those targeted were the portals of the national disaster management, roads administration and water agencies, as well as the defence ministry and the national land transport institute.

The hackers have placed a message in one of the websites demanding ransom money to be paid in 24 hours.

“If the sum of $20,000 is not transferred in Bitcoin, confidential data will be leaked, including that of the Ministry of Defence and all official information and secret emails,” the message read.

The hackers said they had “completely infiltrated” 34 ministries and there was no quick fix.

They said the government had underestimated the scale of the attack.

Erminio Jasse, the head of Mozambique’s National Institute of Electronic Government, had on Monday assured that no information was stolen.

The government is expected to give an update again on Wednesday.