LONDON (MarketWatch) -- Barclays said it's temporarily suspended any further issuances of the iPath Dow Jones-AIG natural gas subindex total return exchange-traded notes (GAZ 13.97, +0.16, +1.16%) . This suspension may cause fluctuations in the trading value of such Notes. Barclays added the move may affect other commodity-linked iPath ETNs in light of current market dynamics and ongoing regulatory review.