Amazon.comInc. is working to launch its fast delivery service on Web in May in orderto target a larger audience, Bloomberg News reported April 1.

Prime Now is currently available via a smartphone app.

As part of its plans, the online retailer is offeringmarketing deals to major brands for the Web launch. The premium "LaunchHero Package" would reportedly cost $500,000 for about two weeks ofplacement on Amazon's website associated with the rollout.