How can I execute a native SQL script in JPA/Hibernate?

I have a SQL script with database dump. How can I execute it using Hibernate's EntityManager?

I tried it this way:

EntityManager manager = getEntityManager(); 
Query q = manager.createNativeQuery(sqlScript);
q.executeUpdate();

but it works only when sqlScript contains a single SQL query, while I need to run multiple inserts and other complex stuff.

RDBMS: Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production