CASABLANCA, Morocco — More than 10,000 Moroccans chanting "Death to Israel" took to the streets of Casablanca on Sunday to protest against the US decision to move its embassy in Israel to Jerusalem.

The marchers carried Palestinian flags and placards that read "Al Quds (Jerusalem) Palestine's eternal capital".

The United States opened its embassy in Jerusalem on May 14, moving it from Tel Aviv, a move that reversed decades of US policy and delighted Israel and infuriated Palestinians.

The status of Jerusalem is one of the thorniest obstacles to forging a peace deal between Israel and the Palestinians, who with broad international backing want East Jerusalem, captured by Israel in the 1967 Middle East war, as their capital.

On the day the United States opened its new embassy, Israeli troops killed 60 Palestinians near the border in Gaza.

The Casablanca protest had been called by a coalition of four parties including the Islamist opposition group Al-Adl Wal Ihsan which is seen as Morocco's most powerful opposition group in terms of rallying supporters on the street.

Meanwhile in Haifa, hundreds of Arab Israelis demonstrated Saturday evening in solidarity with Gaza.

Protesters shouted "down with the occupation, stop fascism" and denounced the arrests Friday of 19 people in northern the city during a previous rally held in solidarity with Gaza residents.

They waved four large letters in bright red, making up the word "Gaza" and chanted slogans including "Jews and Arabs, we are not enemies".

Palestinian and Israeli sources on Sunday said a Palestinian prisoner had died of a heart attack whilst in Israeli custody.

Aziz Ewisat was serving a 30-year prison sentence since 2014 and had suffered a heart attack earlier this month, the Palestinian Prisoners' Club said.

Israeli prison authorities said he had heart failure after attacking a guard, adding that Ewisat was a member of Hamas.

Israeli Arabs, the descendants of Palestinians who remained on their land when Israel was created in 1948, are around 17.5 percent of the Israeli population. — Agencies