NEW : ... Authorities in Coatesville , Pennsylvania , declare state of emergency . Since start of year , 14 suspicious fires have happened in a town near Philadelphia . The fire department is investigating the cause and will be looking for any possible arsonists or accomplices to help them find out who started these fires. Federal investigators are now part of a probe into the possible arsons . No residents were injured in a fire Sunday that damaged 15 homes , authorities said .
NEW : Authorities in Coatesville , Pennsylvania , declare state of emergency . Since start of year , 14 suspicious fires have happened in a town near Philadelphia . The fire department is investigating the cause and will be looking for any possible arsonists or accomplices to help them find out who started these fires. Federal investigators are now part of a probe into the possible arsons . No residents were injured in a fire Sunday that damaged 15 homes , authorities said .