Rome, June 10 - Premier Enrico Letta said Monday that he was alarmed by the high rate of abstention in run-off votes in many Italian towns and cities, including Rome and 10 provincial capitals. "It's an alarming signal," said Letta. "I htink everyone has to reflect on this". The interior ministry said less than half of eligible voters bothered to take part in the run-offs, 48.5%. This is down from 59.7% in the first round, which was already a big drop on the equivalent local elections in 2008. In Rome less than half of the people eligible, 44.93%, took part in the run-off that saw centre-left candidate Ignazio Marino prevail after just 52.81% took part in the first round.