(CNN) -- Gunmen attacked a facility treating Ebola patients in Monrovia, Liberia, on Saturday, and some patients fled, Liberian National Police spokesman Sam Collins told CNN Sunday.
No one was injured in the attack, he said.
All patients who ran away had Ebola, according to Collins, and some chose to stay at the facility.
Since an Ebola epidemic was declared in Guinea in March, the disease has spread to Sierra Leone, Liberia and Nigeria.
In the deadly disease's current outbreak in West Africa, 712 people have died from Ebola and 1,310 people are confirmed to be infected with the virus, the World Health Organization reports.
Ebola is spread through contact with organs and body fluids such as blood, saliva, urine and other secretions of infected people.
CNN's Kay Guerrero contributed to this report.
™ & © 2014 Cable News Network, Inc., a Time Warner Company. All rights reserved.