European shares bounce back as Ukraine tension ease
* FTSEurofirst 300 index gains 1.3 percent
* Ukraine rebels hand over black boxes from Malaysian plane
* ARM Holdings surges after strong results
* Actelion gains as results revive M&A speculation
By Atul Prakash
LONDON, July 22 (Reuters) - European shares rose on Tuesday on some strong earnings reports and signs of improved cooperation from Ukraine's pro-Russian rebels over the Malaysian Airlines plane shot down four days ago.
By 1440 GMT, the FTSEurofirst 300 index of top European shares was 1.3 percent higher at 1,373.32 points after falling 0.5 percent in the previous session.
The planned handover of flight MH17's black boxes and reports by international investigators of improved access to its wreckage came as European Union foreign ministers threatened Russia with harsher sanctions for its support for the rebellion.
Tougher talk may not be matched by much action, however, after France's president signalled the disputed delivery of a warship to Moscow would go ahead. Continuación...