Fires that broke out across Greece over the weekend have stretched firefighting capabilities to the limit, Greek authorities said on Sunday.The town of Kalamos, some 44 kilometers (27 miles) north of the capital, is a favorite vacation spot for Athenians. Authorities think a series of new fires on the western Greek island of Zakynthos were set deliberately. The country's fire service says there are "well-founded suspicions of foul play" after five fires broke out late Saturday and early Sunday, followed by another three later on Sunday morning.