CAIRO, Jan 30 (Aswat Masriya) - Egypt's Prime Minister Ibrahim Mehleb mourned on Friday victims of the North Sinai deadly attacks which left at least 30 killed and 50 injured late Thursday, offering deep condolences to their families.

Mehleb also called upon all nations and international human rights organisations, to record the sacrifices of Egyptians in the face of terrorism, to defend the whole world. He renewed Egypt's warnings that unless there is an international collective action against terrorism, everyone will be harmed.

On Wednesday, international watchdog Human Rights Watch (HRW) said the government of Egypt "consolidated control through constriction of basic freedoms and a stifling campaign of arrests," in a report.

The report stated that Egypt's "human rights crisis, the most serious in the country’s modern history, continued unabated throughout 2014." It added that President Abdel Fattah al-Sisi has overseen a "reversal of the human rights gains" after the January 2011 uprising.

At least 30 people were killed and 50 others were injured late Thursday in four separate attacks against security installations in North Sinai.

Egypt's recovery and the assumption of its regional and international role "provokes" the "terrorists" behind the attacks, Mehleb said in a statement. He added that the "terrorists" will try to hinder the advancement towards the third milestone of the road map, in reference to the upcoming parliamentary elections, due in March.

The army spokesman said that "terrorist" elements were behind the attacks against security installations in North Sinai as a result of the armed forces' recent "successful blows" against them, in a statement released late Thursday.

Egypt's most active militant group Ansar Bayt al-Maqdis, which changed its name to Sinai Province since pledging allegiance to the leader of the Islamic State fighters in Iraq and Syria, claimed responsibility of the attacks on its Twitter account hours after they were launched.

Sisi cut short his visit to Ethiopia on Friday to attend the African Union summit following the attacks, the Egyptian presidency said in a statement.

Sisi declared a state of emergency and a curfew in the border governorate last October, in reaction to a militant attack which left over 30 security personnel killed.

It was extended until April 25, the cabinet said in a statement earlier this week.

Militants have stepped up attacks targeting security forces in Egypt, particularly in the Sinai peninsula, since the ouster of Islamist President Mohamed Mursi in July 2013.