A man has been arrested in connection with an armed raid in Dublin city centre yesterday afternoon. At around midday yesterday, two workers in the cash office of a car park on Mercer Street were tied-up and assaulted by two armed men. The raiders escaped in a Northern-registered black saloon car, with an estimated €60,000. Gardaí arrested a 28-year-old man in the city centre early this morning. He was taken in for questioning at Harcourt Terrace Garda Station.