MANCHESTER, N.H. (AP) — Police in Manchester, New Hampshire, are investigating two serious crashes, one of which resulted in a death.

They say one person was killed in a crash before 4 a.m. Tuesday and led to the closure of Lake Avenue between Belmont and Wilson streets for several hours.

A separate crash was reported at about 5:50 a.m. on South Mammoth Road and led to a partial road closure.

The crashes do not appear to be related.