ROCHESTER HILLS -- A Metro Detroit Muslim group plans to hold a prayer service Tuesday night for the victims in the Sunday mass shooting in Orlando that left 50 people dead and over 50 people injured.

The Ahmadiyya Muslim Community Center in Rochester Hills will host the service, and is encouraging its members to break fast in order to donate blood for those in need.

Many Muslims abstain from eating or drinking during daylight hours through the Islamic month of Ramadan, which began Sunday.

The Orlando incident has been called the largest mass shooting in U.S history.

Health officials in Orlando asked for blood donations to aid injured victims of the shootings Sunday.

"We condemn this senseless and horrific act of violence in the strongest possible terms," said Dr. Mansoor Qureshi, president of Ahmadiyya Muslim Community's Metro Detroit chapter.

"Our hearts go out to the innocent victims and their families. We stand in solidarity with them as their neighbors and brothers and sisters in peace. Islam teaches reverence for all human life. This is a time to pray and act to stop such senseless violence in our nation."

The Ahmadiyya Muslim Community is a sect that describes itself as a "dynamic, reformist and fast-growing international movement within Islam."

The prayer service will take place at 8:30 p.m. at the Ahmadiyya Muslim Community Center, 1730 W. Auburn Road in Rochester Hills.

Another Metro Detroit vigil is scheduled Tuesday night at the Affirmations Community Center, 290 W. Nile Road in Ferndale. That event begins at 7 p.m.

Authorities have identified the gunman in the Orlando shooting as a U.S. citizen who was born in New York to parents originally from Afghanistan.

He reportedly pledged allegiance to the terrorist group ISIS in a phone call to 911 before opening fire at Pulse, an Orlando nightclub popular with the gay community.

But he also reportedly told others he was linked to al-Qaida and Hezbollah, two groups that are violently opposed to each other.

And on Monday the Los Angeles Times reported that he frequented Pulse before the shooting, and used a gay dating app.