The group called Ajnad Misr, or Soldiers of Egypt, emerged
last month, claiming responsibility for six attacks at the end
of January, according to SITE Intelligence group, which monitors
websites used by militant Islamist groups.
Six people were wounded in Friday's two bomb blasts near a
police checkpoint in Cairo.
In the Facebook statement, which was also reported by SITE,
Ajnad Misr said: "(The security forces) are not safe from
retaliation which is pursuing them."
"Our attacks on them will continue all the while their crimes
Lethal shootings and bomb attacks targeting the Egyptian
security forces have become commonplace since last July, when
the army deposed president Mohamed Mursi of the Muslim
Brotherhood following mass protests against his rule.
Many of the attacks have been claimed by Ansar Bayt al-Maqdis, a
group based in North Sinai that has turned its attention from
Israel to the Egyptian government since Mursi's overthrow.
The army-backed authorities have cracked down hard on Mursi's
Islamist sympathisers since his removal. Hundreds of his
supporters were killed during protests in the weeks after his
removal and thousands more were arrested.
Several hundred members of the security forces have been killed
in bombings and shootings since then.
(Writing by Tom Perry; editing by Gareth Jones)
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