Local media WWLTV reports that at least twelve people have been shot at a Mother's Day parade. It's understood that the youngest victim of the shooting is ten-years-old.
Police report that up to three people are believed to be in a critical condition in hospital.
NBC understands that there are no fatalities as a result of the shooting.
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The maintenance worker spent 10 days in hospital after plunging 9.5 metres from a scaffold tower at a disused station.
Workers and managers are to stage another strike on Saturday amid a long-running dispute over jobs, pensions and closures.
The unexpected call could prompt a diplomatic rift with China, which regards Taiwan as a breakaway province from its mainland.