CAIRO — Palestinian leader Mahmoud Abbas met with Egypt’s interim president Adly Mansour in Cairo in a show of support for the government that took over after Mohammed Morsi’s ouster.

The visit on Monday comes as Egyptian authorities are investigating the role of Abbas’s rival Palestinian group Hamas in a 2011 prison break that freed Morsi and several other members of the Muslim Brotherhood who had been detained under the previous regime.

Egyptian prosecutors are investigating Morsi on charges of murder and conspiring with Hamas in connection with the jailbreak, which left 14 inmates dead amid the chaos during the uprising that toppled autocrat Hosni Mubarak.

Authorities have imposed the toughest border restrictions on the Hamas-run Gaza Strip in years, sealing smuggling tunnels, blocking most passenger traffic since Morsi’s July 3 fall.

But Hamas claimed in a statement on Monday that Abbas was visiting Egypt only to “incite” the public against it and convince the leadership in Cairo to officially accuse Hamas of killing 16 Egyptian soldiers in Sinai last year, “which is completely false and fabricated.”

Pointing a finger also at Abbas’s Fatah political party, Hamas, which controls the Gaza Strip, said it had documents that exposed “the conspiracy led by Fatah to demonize and defame Hamas and the Palestinian resistance.”