The public responded overwhelmingly Sunday after One Blood put out an urgent call for blood donations, especially Type O, in Orlando after a mass shooting at a nightclub.

All One Blood locations were at capacity Sunday afternoon, and the blood center stopped taking donations by 5 p.m.

Donors were asked to instead call 888-936-6283 to make appointments over the next several days, when blood supplies will need to be replenished.

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"There is a dramatic increase in the demand for O Negative blood by area hospitals and as a result OneBlood, the local blood center, is urging people with O Negative blood to please donate as soon as possible," OneBlood said in a release.

OneBlood said there was an urgent need for O Negative, O Positive, and AB Plasma blood donors.

You can find the hours and locations of One Blood here or reach them by phone at 1-888-9Donate.

OneBlood listed the following locations as having the Big Red Bus in the Orlando area:

Metro Church, Winter Springs

St. Cloud Presbyterian

Asbury Methodist, Maitland

St. Lukes, Oviedo

AMC Theater, Altamonte Mall

1st Unitarian, Robinson Street

St. Stephen' Longwood

Deltona Lakes Baptist

Apopka, 121 N. Park Avenue

Walmart Mount Dora

Waterford Lakes Town Center

Winter Garden Village

Old Navy near Sanford Mall

Meanwhile, the University of Central Florida will be holding a blood drive with the Big Red Bus, 11 a.m. to 4 p.m. Monday at the Student Union. Students, faculty, and staff interested in working with the Knights Bleed Black and Gold Blood Drive Advisory Council, please contact BloodDrives@ucf.edu.

The Red Cross is also accepting donations toward the response in Orlando. Donate at 800-733-2767 or redcross.org.

The need comes after police say at least 50 people were slain at an Orlando nightclub. The shooter was killed in a shootout with police.

In addition to the slayings, at least 53 other victims were taken to area hospitals for medical treatment, police said. There were an estimated 320 people in the club when it opened Saturday night.

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