With reference to the FDA CFR PART 312 -- INVESTIGATIONAL NEW DRUG APPLICATION, Subpart B--Investigational New Drug Application (IND),
Sec. 312.32 IND safety reporting. Look at the FDA website and search 312.32 IND safety reporting.
(Sorry but the Elsmar forum does not allow links for new members, even part of a link, in case a FDA link would be a spam!!)
In other words, what is known outside of the US should be reported to the US and what is known in the US should be reported in particular to Europe Authorities (EMA).
Safety reporting rules must be established, maintained and strictly applied.
Dominique