| A 
				flash fire broke out on the hydrogen pipe, said two sources 
				familiar with plant operations. At least two of the workers 
				required medical treatment.
 The sulfur unit is shut as part of a planned overhaul of units 
				at the 209,787 barrel-per-day (bpd) Convent refinery that 
				includes the gasoline-producing fluidic catalytic cracking unit, 
				the sources said.
 
 "Shell initiated its emergency response plan, which included 
				immediately deploying personnel to respond to the incident," 
				Shell spokesman Ray Fisher said on Thursday. "All appropriate 
				agencies were notified. The cause of the incident is under 
				investigation."
 
 (Reporting by Erwin Seba; Editing by Kim Coghill and Sunil Nair)
 
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