Economic growth across the 19-country eurozone in the first quarter has been revised back up to a quarterly rate of 0.6 percent from 0.5 percent previously.

Figures published Tuesday by statistics agency Eurostat show growth was helped by stronger domestic demand, spending and investment.

The agency had first estimated growth at 0.6 percent, only to revise it down to 0.5 percent and now back up to 0.6 percent.

The growth rate is relatively strong, but analysts do not expect the currency zone to be able to sustain that pace for the rest of the year. Global economic uncertainties, such as a slowdown in China and emerging economies, as well as a looming vote in Britain on whether to leave the European Union are expected to weigh on the eurozone economy.