(RTTNews) - The Institute for Supply Management released a report on Wednesday showing an unexpected slowdown in the pace of growth in U.S. service sector activity in the month of April. Anthony Nieves, Chair of the ISM Services Business Survey Committee, said the pullback by the index was mostly due to the restricted labor pool and the slowing of new orders growth. "Business activity remains strong; however, high inflation, capacity constraints and logistical challenges are impediments, and the Russia-Ukraine war continues to affect material costs, most notably of fuel and chemicals," said Nieves.