Emergency services respond to a serious two-vehicle crash near Wallacetown in Southland, blocking part of State Highway 99. Both outlets report that the crash involves two vehicles and that it results in serious injuries, based on initial information. The incident is reported to be occurring on SH99 in the Wallacetown area, prompting the closure or blockage of at least part of the highway while responders attend the scene. The reporting indicates that emergency services are on site and managing the situation, but neither outlet provides further details on the cause of the crash, the number of people injured, or the extent of injuries beyond the initial description as “serious.” The available information focuses on the location of the crash and the resulting impact on road access, with the highway affected while the response and any necessary recovery or investigation take place.