The delivery wars continue to heat up.

A day after Target Corp. announced the acquisition of technology transportation company Grand Junction, the discounter said it has expanded the test of its next-day delivery service of household essentials, Target Restock, to the Dallas-Fort Worth and Denver markets. Target’s announcement came the same day that Amazon launched Instant Pickup, which offers a curated selection of daily essentials available for pickup in two minutes or less.

The expansion of Target Restock comes after the pilot launched in late June, in the Minneapolis-St. Paul area. Since then, Target has been working on various enhancements, including expanding the available assortment from the original 10,000…