The 19-nation eurozone grew by 0.4 percent in the second quarter, official data showed on Tuesday, revising upward a first estimate that sparked worries about the health of the European economy.

Last month, the EU's Eurostat agency said the eurozone grew by just 0.3 percent in the April to June period.

Eurostat also updated the first quarter growth figure from 0.4 percent to 0.5 percent, boosted by high-growth Ireland which was not included earlier estimates, a Eurostat official said.