A continuous liquid flow of water in a vacuum (a liquid beam) was irradiated with a pulsed IR laser at 2.96 mum that is resonant to an OH stretching mode of liquid water. Neutral species ejected from the liquid beam were detected directly by a Daly detector without ionization. The flight-time distribution was found to show neutral species having high and low velocities, which are attributable to water clusters ejected from the surface and inside of the liquid beam, respectively. The flight-time distribution expressed by a Maxwellian velocity distribution reveals that the clusters are ejected by explosion of the liquid beam after absorption of the IR laser. This ejection scheme is supported by the presence of a delayed ejection of clusters, which is considered to originate from the inside of the liquid beam into the gas phase.