  We construct a class of analytic solutions with two free parameters to the
five-dimensional Einstein field equations, which represents the collision of
two timelike 3-branes. We study the local and global properties of the
spacetime, and find that spacelike singularities generically develop after the
collision, due to the mutual focus of the two branes. Non-singular spacetime
can be constructed only in the case where both of the two branes violate the
energy conditions.
